The error message is displayed on the right side on a large screen

In a bit smaller screen

I feel this would look good

Change 975393 had a related patch set uploaded (by Punith.nyk; author: Punith.nyk):

[mediawiki/extensions/WikiLambda@master] Move the error message(User does not have permission to edit) closer to the button

https://gerrit.wikimedia.org/r/975393

i've tested this on beta/prod and we consistently display floating messages at the center-bottom of the screen.

success message bar after publish (gif)

error message bar after trying to connect/disconnect an implementation/test (gif)

the change of state (with a subtle fade in), might be enough to drive attention to the user. i've consulted the codex docs and we don't have clear guidance on where and how to display those messages.

my suggestion (for now) would be to keep this generic approach as is.

Change 975393 abandoned by Jforrester:

[mediawiki/extensions/WikiLambda@master] Move the error message(User does not have permission to edit) closer to the button

Reason:

Over-taken by other code, but thank you!

https://gerrit.wikimedia.org/r/975393