App Store Updates does not renders correctly in High Sierra It has been around a week that my Updates tab in the App Store looks like this:

All the other tabs are looking normal.
The only thing I tried was a restart, the iMac does not have any other weird behaviour.
Here are my details, serial hidden for privacy:

Thank you.
I was getting the incompatible upgrade message for GarageBand until I upgraded to MacOS Big Sur.  After I upgraded to the new  OS that error went away for me.