[Plugin: AG Custom Admin] Doesn't hide the "Fluency Admin" message..

This is not supported by AG Custom Admin, because it is Fluency Admin specific problem, and not WordPress/AGCA related. However, you could fix this if you hard-code some values in plugin.php. So, open plugin.php file and add this line

jQuery("#footer p:first").hide();

after first line that starts like this

jQuery(document).ready(function() {

That should do the trick.

Hmm.. not sure what’s that. You could try also to clear browser’s cache before reloading page. Yes, you could use ag_style.css inside style folder to add custom styles. Add this style as a fix:

#footer p:first-child{
	display:none;
}

Otherways, the only option is to manualy remove footer content in Fluency plugin.

Cheers

You’re welcome:)
Try with this CSS fix

#dashboard_right_now .versions #wp-version-message{
      display:none;
}

or just

#wp-version-message{
      display:none;
}

Cheers