I have looked a bit deeper into the issue:
Different Adblockers mostly still use the same filter lists.
One list called EasyPrivacy blocks the Sentry script. That is a third party script which ModularGrid uses to log errors.
The main MG script stopped execution if the Sentry script was missing, that lead to the error of broken search and missing modules in racks.
The initialization of the Sentry script is now in a try/catch block, so I hope everything should be working fine, regardless of your chosen browser or adblocker.
Beep, Bopp, Bleep: info@modulargrid.net