I installed the script and opened an SO question and there was no new icon and instead I have the following error in the console:
Uncaught (in promise) TypeError: Cannot read properties of null (reading 'classList')
at refresh_in_collection_status (userscript.html?name=StackExchange%2520duplicate%2520manager.user.js&id=7d495f25-2eda-46aa-a822-32c3b92896a1:1961:27)
I installed the script and opened an SO question and there was no new icon and instead I have the following error in the console:
I'm using latest Chrome with Tampermonkey.