The tab order on the page is not consistent.

For example :

When navigating with the keyboard and the form contains an error, you tab into a visually hidden link.

Corrections:

The tab path should not reach visually hidden elements. Delete the "Connection failed, please try again" link, which duplicates the message displayed.
Check that the tab path is consistent throughout the page.

Can this non-compliance be corrected? Moodle code (upgraded to 4.5 but still not valid).

<a href="#" id="loginerrormessage" class="sr-only">Login failed, please try again</a> <div class="alert alert-danger" role="alert">Login failed, please try again</div>