Hello,
I created a simple application on a clean, on-premises APEX 26.1 instance (so no upgrade or refresh Theme issues). I ran the Advisor on the application and received the following error message for all of the buttons:

The error message claims that #DOM_ID# is missing from the Button Template (marked blue), but the code snippet includes it (marked red). I also checked the Template itself, and #DOM_ID# does appear in it:

What am I missing?
Thanks, and kind regards,
Arie.