Mautic.getActiveBuilderName is not a function

Your software
My Mautic version is: 5.1.1
My PHP version is: 8.2.24
My Database type and version is: Mariadb 10.5.18

The problem
My problem is:
The menu links on the admin don’t work when I click. I got this error: “Mautic.getActiveBuilderName is not a function”

When I put an admin address (/s/contacts for example) directly into the browser’s address line, everything works.

In the js files there are a lot of references to this function, but the function can be found.

I tried to regenerate the assets, without success.

How can I solve this? Thanks for your response in advance.

I solved this by putting this code line into the app.js

Mautic.getActiveBuilderName=function(){return ‘’;}

But it would be nice if the official repository would be fixed.