To fix Script Error, An error has occurred in the script on this page in Outlook, Teams, etc. you will need to use the Internet Options in Windows 11/10.

Check to see if the ‘A JavaScript Error Occurred in the Main Process’ still appears after restarting your computer and you launch the app. 2) Re-register the JavaScript dll file ...

Next I'm going to try to uninstall/reg clean/reinstall/patch to 1.2, but after reading a bunch of messages on the Painkiller forums about script errors even after patching, I'm not too confident ...