Autoupdate for Mac - infinite loop - wrongly claims background tasks not allowed

MS Office Version 16.89.1 (24091630).

Autoupdate version 4.75

macOS 15.0 Sequoia

Licence: Microsoft 365 Subscription

When I choose “Check for Updates” in Word or Excel Autoupdate opens looking like this:

After a while, it looks like this:

I click on "Settings" and find that all 3 Microsoft background tasks are allowed. When I click on the Autoupdate dialog it redisplays the open Settings dialog. There is no way to dismiss that dialog. Only choice is to force quit Autoupdate.

I have:

• downloaded and installed Autoupdate v4.75 (I think the lastest);
• followed advice here: https://techcommunity.microsoft.com/t5/microsoft-365/autoupdate-for-mac-is-not-working/m-p/2396203/highlight/true#M42902.

Still, Autoupdate does not see that the background tasks are allowed.  What else can I do to get Autoupdate working ?