Steps to reproduce:-
Converted the chrome extension with this command (xcrun safari-web-extension-converter /path/to/extension)
Then after conversion, it opens in Xcode.
Then in the signing tab, I selected Team and bundle Identifier.
After this when I run the project "Quit and Open Safari Extension Preferences.." a dialogue box opens but when I click on that button it doesn't go to Safari extension preferences.
It gives error like this:- {Optional(Error Domain=SFErrorDomain Code=1 "(null)")}
Did you enable the Develop menu in Safari and turn on the “Allow Unsigned Extensions” option?
Make sure to enable it and then it should show up.