Error 504 in MDB Drag and Drop Builder Not Working in Chrom

Expected behavior The Drag and Drop ,Should Work or is it a premium feature?

Actual behavior I tried on three browsers Mozilla FireFox 126 Opera GX Stable 109 Chrome Canary 127 None of them downloaded anything , the request does not go through I have tried even using a VPN still nothing, I Understand that chrome canary might be unstable but it still does not work on firefox neither opera gx stable is working or firefox.

Resources (screenshots, code snippets etc.)

REQUEST PAYLOAD {"html":"<div id=\"preview\" class=\"preview\"><div style=\"display: none;\"></div><div><div style=\"position: relative;\" data-draggable=\"true\"><!----><!----><section draggable=\"false\" class=\"overflow-hidden pt-0\" data-v-271253ee=\"\"><section class=\"\" style=\"padding-bottom: 1px;\"> <!-- Navbar --> <nav class=\"navbar navbar-expand-lg navbar-light bg-white shadow-2\"> <!-- Container wrapper --> <div class=\"container-fluid\"> <div class=\"d-flex\"> <!-- Toggle button --> <button class=\"navbar-toggler\" type=\"button\" data-mdb-toggle=\"collapse\" data-mdb-target=\"#navbarSupportedContent\" aria-controls=\"navbarSupportedContent\" aria-expanded=\"false\" aria-label=\"Toggle navigation\"> <i class=\"fas fa-bars\"></i> </button> <!-- Navbar brand --> <a class=\"navbar-brand ms-3\"> <i class=\"fas fa-gem text-primary\" aria-controls=\"#picker-editor\"></i> </a> </div> <!-- Collapsible wrapper --> <div class=\"collapse navbar-collapse\" id=\"navbarSupportedContent\"> <!-- Left links --> <ul class=\"navbar-nav me-auto mb-2 ms-2 ps-1 ms-lg-0 ps-lg-0 mb-lg-0\"> <li class=\"nav-item\"> <a class=\"nav-link\" href=\"\" aria-controls=\"#picker-editor\">Dashboard</a> </li> <li class=\"nav-item\"> <a class=\"nav-link\" href=\"\" aria-controls=\"#picker-editor\">Team</a> </li> <li class=\"nav-item\"> <a class=\"nav-link\" href=\"\" aria-controls=\"#picker-editor\">Projects</a> </li> </ul> <!-- Left links --> </div> <!-- Collapsible wrapper --> <!-- Right elements --> <div class=\"d-flex align-items-center\"> <button type=\"button\" class=\"btn btn-link px-3 mb-1 me-2\" aria-controls=\"#picker-editor\">Login</button> <button type=\"button\" class=\"btn btn-primary mb-1 me-lg-3\" aria-controls=\"#picker-editor\">Sign up</button> </div> <!-- Right elements --> </div> <!-- Container wrapper --> </nav> <!-- Navbar --> </section></section><!----></div><div style=\"position: relative;\" data-draggable=\"true\"><!----><!----><section draggable=\"false\" class=\"container pt-5\" data-v-271253ee=\"\"><section class=\"mb-10\"> <h2 class=\"fw-bold mb-5 text-center\">Why is it so great?</h2> <div class=\"row gx-lg-5 align-items-center\"> <div class=\"col-lg-5 mb-5 mb-lg-0\"> <div class=\"bg-image rounded-5 shadow-5-strong\" style=\"background-image: url(&quot;https://mdbootstrap.com/img/new/textures/full/98.jpg&quot;); height: 560px; background-size: cover; background-position: 50% 50%; background-color: rgba(0, 0, 0, 0);\" aria-controls=\"#picker-editor\"> <div class=\"mask\" style=\"background-color: rgba(0, 0, 0, 0.7)\"> <div class=\"d-flex justify-content-center align-items-center h-100\"> <div class=\"px-4 py-5 px-md-5 text-white text-center\"> <h3 class=\"text-uppercase fw-bold mb-4\"> <span>The future is</span> <u style=\"color: hsl(210, 12%, 80%)\">now</u> </h3> <p class=\"mb-0\" style=\"color: hsl(210, 12%, 80%)\">Lorem ipsum dolor sit amet consectetur adipisicing elit. Harum quia laboriosam error consequuntur fugit, doloribus rerum, iure nesciunt amet quidem veniam cupiditate hic fugiat dolore aperiam quisquam libero earum quibusdam?</p> </div> </div> </div> </div> </div> <div class=\"col-lg-7 mb-4 mb-lg-0\"> <div class=\"d-flex align-items-start mb-5\"> <div class=\"flex-shrink-0\"> <div class=\"p-3 rounded-4 shadow-2-strong\" style=\"background-color: hsl(204, 30%, 20%)\"> <i class=\"fas fa-headset fa-lg text-white fa-fw\" aria-controls=\"#picker-editor\"></i> </div> </div> <div class=\"flex-grow-1 ms-4\"> <p class=\"fw-bold mb-1\">Support 24/7</p> <p class=\"text-muted mb-0\">Lorem ipsum dolor, sit amet consectetur adipisicing elit. Nihil quisquam quibusdam modi sapiente magni molestias pariatur facilis reprehenderit facere aliquam ex.</p> </div> </div> <div class=\"d-flex align-items-start mb-5\"> <div class=\"flex-shrink-0\"> <div class=\"p-3 rounded-4 shadow-2-strong\" style=\"background-color: hsl(204, 30%, 20%)\"> <i class=\"fas fa-shield-alt fa-lg text-white fa-fw\" aria-controls=\"#picker-editor\"></i> </div> </div> <div class=\"flex-grow-1 ms-4\"> <p class=\"fw-bold mb-1\">Safe and solid</p> <p class=\"text-muted mb-0\">Eum nostrum fugit numquam, voluptates veniam neque quibusdam ullam aspernatur odio soluta, quisquam dolore animi mollitia a omnis praesentium, expedita nobis!</p> </div> </div> <div class=\"d-flex align-items-start mb-5\"> <div class=\"flex-shrink-0\"> <div class=\"p-3 rounded-4 shadow-2-strong\" style=\"background-color: hsl(204, 30%, 20%)\"> <i class=\"fas fa-shipping-fast fa-lg text-white fa-fw\" aria-controls=\"#picker-editor\"></i> </div> </div> <div class=\"flex-grow-1 ms-4\"> <p class=\"fw-bold mb-1\">Extremely fast</p> <p class=\"text-muted mb-0\">Enim cupiditate, minus nulla dolor cumque iure eveniet facere ullam beatae hic voluptatibus dolores exercitationem? Facilis debitis aspernatur amet nisi iure eveniet facere?</p> </div> </div> <div class=\"d-flex align-items-start\"> <div class=\"flex-shrink-0\"> <div class=\"p-3 rounded-4 shadow-2-strong\" style=\"background-color: hsl(204, 30%, 20%)\"> <i class=\"fas fa-chart-pie fa-lg text-white fa-fw\" aria-controls=\"#picker-editor\"></i> </div> </div> <div class=\"flex-grow-1 ms-4\"> <p class=\"fw-bold mb-1\">Live analytics</p> <p class=\"text-muted mb-0\">Illum doloremque ea, blanditiis sed dolor laborum praesentium maxime sint, consectetur atque ipsum ab adipisci ullam aspernatur odio soluta, quisquam dolore</p> </div> </div> </div> </div> </section></section><!----></div><div style=\"position: relative;\" data-draggable=\"true\"><!----><!----><section draggable=\"false\" class=\"overflow-hidden pt-0\" data-v-271253ee=\"\"><section class=\"mb-10\"> <!-- Background image --> <div class=\"p-5 text-center bg-image\" style=\"background-image: url(&quot;https://mdbootstrap.com/img/new/textures/full/142.jpg&quot;); height: 500px; background-size: cover; background-position: 50% 50%; background-color: rgba(0, 0, 0, 0);\" aria-controls=\"#picker-editor\"></div> <!-- Background image --> <div class=\"container\"> <div class=\"card mx-4 mx-md-5 text-center shadow-5-strong\" style=\" margin-top: -170px; background: hsla(0, 0%, 100%, 0.7); backdrop-filter: blur(30px); \"> <div class=\"card-body px-4 py-5 px-md-5\"> <h1 class=\"display-3 fw-bold ls-tight mb-4\"> <span>The best offer on the market</span> <br> <span class=\"text-primary\">for your business</span> </h1> <a class=\"btn btn-primary btn-lg py-3 px-5 mb-2 mb-md-0 me-md-2\" href=\"#\" role=\"button\" aria-controls=\"#picker-editor\">Get started</a> <a class=\"btn btn-link btn-lg py-3 px-5 mb-2 mb-md-0\" data-ripple-color=\"primary\" href=\"#\" role=\"button\" aria-controls=\"#picker-editor\">Learn more</a> </div> </div> </div> </section></section><!----></div><div style=\"position: relative;\" data-draggable=\"true\"><!----><!----><section draggable=\"false\" class=\"container pt-5\" data-v-271253ee=\"\"><section class=\"mb-10 text-center\"> <style> .cascading-right { margin-right: -50px; } @media (max-width: 991.98px) { .cascading-right { margin-right: 0; } } </style> <!-- Jumbotron --> <div class=\"container py-4\"> <div class=\"row g-0 align-items-center\"> <div class=\"col-lg-6 mb-5 mb-lg-0\"> <div class=\"card cascading-right\" style=\" background: hsla(0, 0%, 100%, 0.55); backdrop-filter: blur(30px); \"> <div class=\"card-body py-5 px-md-5 shadow-5\"> <h2 class=\"fw-bold mb-6\"> <span>Trusted by the best companies</span> <br> <span class=\"text-primary\">around the world</span> </h2> <div class=\"row\"> <div class=\"col-6 mb-5\"> <img src=\"https://mdbcdn.b-cdn.net/img/Photos/new-templates/landing-page/logo6-1.png\" class=\"img-fluid grayscale px-2 px-md-5\" alt=\"\" aria-controls=\"#picker-editor\"> </div> <div class=\"col-6 mb-5\"> <img src=\"https://mdbcdn.b-cdn.net/img/Photos/new-templates/landing-page/logo5-1.png\" class=\"img-fluid grayscale px-2 px-md-5\" alt=\"\" aria-controls=\"#picker-editor\"> </div> <div class=\"col-6\"> <img src=\"https://mdbcdn.b-cdn.net/img/Photos/new-templates/landing-page/logo3-1.png\" class=\"img-fluid grayscale px-2 px-md-5\" alt=\"\" aria-controls=\"#picker-editor\"> </div> <div class=\"col-6\"> <img src=\"https://mdbcdn.b-cdn.net/img/Photos/new-templates/landing-page/logo4-1.png\" class=\"img-fluid grayscale px-2 px-md-5\" alt=\"\" aria-controls=\"#picker-editor\"> </div> </div> </div> </div> </div> <div class=\"col-lg-6 mb-5 mb-lg-0\"> <img src=\"https://mdbcdn.b-cdn.net/img/new/textures/full/166.jpg\" class=\"w-100 rounded-4 shadow-4\" alt=\"\" aria-controls=\"#picker-editor\"> </div> </div> </div> <!-- Jumbotron --> </section></section><!----></div><div style=\"position: relative;\" data-draggable=\"true\"><!----><!----><section draggable=\"false\" class=\"container pt-5\" data-v-271253ee=\"\"><section class=\"mb-10\"> <h2 class=\"fw-bold mb-5 text-center\">Projects we are proud of</h2> <div class=\"row gx-lg-5 align-items-center\"> <div class=\"col-lg-5 mb-5 mb-lg-0\"> <div class=\"bg-image rounded-5 shadow-5-strong\" style=\"background-image: url(&quot;https://mdbootstrap.com/img/new/textures/full/126.jpg&quot;); height: 560px; background-size: cover; background-position: 50% 50%; background-color: rgba(0, 0, 0, 0);\" aria-controls=\"#picker-editor\"> <div class=\"mask\" style=\"background-color: rgba(0, 0, 0, 0.4)\"> <div class=\"d-flex justify-content-center align-items-center h-100\"> <div class=\"px-4 py-5 px-md-5 text-white text-center\"> <h3 class=\"text-uppercase fw-bold mb-4\"> <span>The future is</span> <u style=\"color: hsl(231, 52.6%, 85%)\">now</u> </h3> <p class=\"mb-0\" style=\"color: hsl(231, 52.6%, 85%)\">Lorem ipsum dolor sit amet consectetur adipisicing elit. Harum quia laboriosam error consequuntur fugit, doloribus rerum, iure nesciunt amet quidem veniam cupiditate hic fugiat dolore aperiam quisquam libero earum quibusdam?</p> </div> </div> </div> </div> </div> <div class=\"col-lg-7 mb-4 mb-lg-0\"> <div class=\"d-flex align-items-start mb-5\"> <div class=\"flex-shrink-0\"> <div class=\"p-3 rounded-4 shadow-2-strong\" style=\"background-color: hsl(231, 52.6%, 20%)\"> <i class=\"fas fa-headset fa-lg text-white fa-fw\" aria-controls=\"#picker-editor\"></i> </div> </div> <div class=\"flex-grow-1 ms-4\"> <p class=\"fw-bold mb-1\">Support 24/7</p> <p class=\"text-muted mb-0\">Lorem ipsum dolor, sit amet consectetur adipisicing elit. Nihil quisquam quibusdam modi sapiente magni molestias pariatur facilis reprehenderit facere aliquam ex.</p> </div> </div> <div class=\"d-flex align-items-start mb-5\"> <div class=\"flex-shrink-0\"> <div class=\"p-3 rounded-4 shadow-2-strong\" style=\"background-color: hsl(231, 52.6%, 20%)\"> <i class=\"fas fa-shield-alt fa-lg text-white fa-fw\" aria-controls=\"#picker-editor\"></i> </div> </div> <div class=\"flex-grow-1 ms-4\"> <p class=\"fw-bold mb-1\">Safe and solid</p> <p class=\"text-muted mb-0\">Eum nostrum fugit numquam, voluptates veniam neque quibusdam ullam aspernatur odio soluta, quisquam dolore animi mollitia a omnis praesentium, expedita nobis!</p> </div> </div> <div class=\"d-flex align-items-start mb-5\"> <div class=\"flex-shrink-0\"> <div class=\"p-3 rounded-4 shadow-2-strong\" style=\"background-color: hsl(231, 52.6%, 20%)\"> <i class=\"fas fa-shipping-fast fa-lg text-white fa-fw\" aria-controls=\"#picker-editor\"></i> </div> </div> <div class=\"flex-grow-1 ms-4\"> <p class=\"fw-bold mb-1\">Extremely fast</p> <p class=\"text-muted mb-0\">Enim cupiditate, minus nulla dolor cumque iure eveniet facere ullam beatae hic voluptatibus dolores exercitationem? Facilis debitis aspernatur amet nisi iure eveniet facere?</p> </div> </div> <div class=\"d-flex align-items-start\"> <div class=\"flex-shrink-0\"> <div class=\"p-3 rounded-4 shadow-2-strong\" style=\"background-color: hsl(231, 52.6%, 20%)\"> <i class=\"fas fa-chart-pie fa-lg text-white fa-fw\" aria-controls=\"#picker-editor\"></i> </div> </div> <div class=\"flex-grow-1 ms-4\"> <p class=\"fw-bold mb-1\">Live analytics</p> <p class=\"text-muted mb-0\">Illum doloremque ea, blanditiis sed dolor laborum praesentium maxime sint, consectetur atque ipsum ab adipisci ullam aspernatur odio soluta, quisquam dolore</p> </div> </div> </div> </div> </section></section><!----></div><div style=\"position: relative;\" data-draggable=\"true\"><!----><!----><section draggable=\"false\" class=\"container pt-5\" data-v-271253ee=\"\"><section class=\"mb-10 text-center\"> <div class=\"row d-flex justify-content-center\"> <div class=\"col-md-10 col-xl-8\"> <h2 class=\"fw-bold mb-5\">Testimonials</h2> </div> </div> <div class=\"row\"> <div class=\"col-md-4 mb-5 mb-md-0\"> <div class=\"d-flex justify-content-center mb-4\"> <img src=\"https://mdbootstrap.com/img/Photos/Avatars/img%20(1).jpg\" class=\"rounded-circle shadow-1-strong\" width=\"150\" height=\"150\" alt=\"\" aria-controls=\"#picker-editor\"> </div> <h5 class=\"mb-3\">Maria Smantha</h5> <h6 class=\"text-primary mb-3\">Web Developer</h6> <p class=\"px-xl-3\"> <i class=\"fas fa-quote-left pe-2\"></i><span>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quod eos id officiis hic tenetur quae quaerat ad velit ab hic tenetur.</span> </p> <ul class=\"list-unstyled d-flex justify-content-center mb-0\"> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"fas fa-star-half-alt fa-sm text-warning\"></i> </li> </ul> </div> <div class=\"col-md-4 mb-5 mb-md-0\"> <div class=\"d-flex justify-content-center mb-4\"> <img src=\"https://mdbootstrap.com/img/Photos/Avatars/img%20(2).jpg\" class=\"rounded-circle shadow-1-strong\" width=\"150\" height=\"150\" alt=\"\" aria-controls=\"#picker-editor\"> </div> <h5 class=\"mb-3\">Lisa Cudrow</h5> <h6 class=\"text-primary mb-3\">Graphic Designer</h6> <p class=\"px-xl-3\"> <i class=\"fas fa-quote-left pe-2\"></i><span>Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid commodi.</span> </p> <ul class=\"list-unstyled d-flex justify-content-center mb-0\"> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> </ul> </div> <div class=\"col-md-4 mb-0\"> <div class=\"d-flex justify-content-center mb-4\"> <img src=\"https://mdbootstrap.com/img/Photos/Avatars/img%20(9).jpg\" class=\"rounded-circle shadow-1-strong\" width=\"150\" height=\"150\" alt=\"\" aria-controls=\"#picker-editor\"> </div> <h5 class=\"mb-3\">John Smith</h5> <h6 class=\"text-primary mb-3\">Marketing Specialist</h6> <p class=\"px-xl-3\"> <i class=\"fas fa-quote-left pe-2\"></i><span>At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti.</span> </p> <ul class=\"list-unstyled d-flex justify-content-center mb-0\"> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"fas fa-star fa-sm text-warning\"></i> </li> <li> <i class=\"far fa-star fa-sm text-warning\"></i> </li> </ul> </div> </div> </section></section><!----></div></div></div>","version":"3.11.0","theme":"light.1"} RESPONSE PAYLOAD

<html> <head><title>504 Gateway Time-out</title></head> <body> <center><h1>504 Gateway Time-out</h1></center> <hr><center>nginx/1.17.5</center> </body> </html>