What it sounds like
Username, edit text, required.
The error message doesn’t have any attributes linking it to the field, so the error message isn’t communicated to the user.
What it looks like
Please enter a value.
<label for="sle-3">Username</label>
<input id="sle-3" aria-required="true" class="has-error" />
<p class="error-message">Please enter a value.</p>