Form validation message overlaps with next form Element

I have a problem with the representation of the Form Validation. It only leaves a certain amount of space for the error message and then for longer error messages, the text slips into the next element. This then looks like this:

I have tried a few things to be able to adjust the height of the element with the error message, but it just doesn't work. What am I doing wrong?

Here is the code of the form including the validation messages.

<form action="&#x2F;register" method="POST" name="register_form" class="mx-1&#x20;mx-md-4" id="register_form">
    <input type="hidden" name="csrf" class="&#x20;is-valid" value="fe78c5cb92605bcd228a362eca60f866">
    <div class="d-flex flex-row align-items-center mb-4">
        <i class="fas fa-user fa-lg me-3 fa-fw"></i>
        <div class="w-100">
            <div class="form-outline">
                <input type="text" name="name" class="form-control&#x20;is-invalid" id="name" value="">
                <label class="form-label" for="name">Dein Name</label>
                <div class="invalid-feedback"><p class="mb-2">Bitte deinen Namen eingeben!</p></div>
            </div>
        </div>
    </div>

    <div class="d-flex flex-row align-items-center mb-4">
        <i class="fas fa-envelope fa-lg me-3 fa-fw"></i>
        <div class="w-100">
            <div class="form-outline">
                <input type="email" name="email" class="form-control&#x20;is-invalid" id="email" value="">
                <label class="form-label" for="email">Deine E-Mail Adresse</label>
                <div class="invalid-feedback"><p class="mb-2">Deine E-Mail Adresse sieht ungültig aus!</p></div>
            </div>
        </div>
    </div>

    <div class="d-flex flex-row align-items-center mb-4">
        <i class="fas fa-lock fa-lg me-3 fa-fw"></i>
        <div class="w-100">
            <div class="form-outline">
                <input type="password" name="password" class="form-control&#x20;is-invalid" id="password" value="">
                <label class="form-label" for="password">Dein neues Passwort</label>
                <div class="invalid-feedback"><p class="mb-2">Dein Passwort muss mindestens 1 Kleinbuchstaben, 1 Großbuchstaben, 1 Ziffer und 1 Sonderzeichen enthalten!</p></div>
            </div>
        </div>
    </div>

    <div class="d-flex flex-row align-items-center mb-4">
        <i class="fas fa-key fa-lg me-3 fa-fw"></i>
        <div class="w-100">
            <div class="form-outline">
                <input type="password" name="password_confirmation" class="form-control&#x20;is-valid" id="password_confirmation" value="">
                <label class="form-label" for="password_confirmation">Bitte Passwort wiederholen</label>
                <div class="valid-feedback"><p class="mb-2">OK</p></div>
            </div>
        </div>
    </div>

    <div class="form-check d-flex justify-content-center mb-5">
        <input class="form-check-input me-2" type="checkbox" value="" id="form2Example3c"/>
        <label class="form-check-label" for="form2Example3">
            I agree all statements in <a href="#!">Terms of service</a>
        </label>
    </div>

    <div class="d-flex justify-content-center mx-4 mb-3 mb-lg-4">
        <input type="submit" name="register" class="btn&#x20;btn-primary&#x20;btn-lg&#x20;is-valid" value="Jetzt&#x20;registrieren">
    </div>

</form>

Resources (screenshots, code snippets etc.)