I develop an extension for Safari on Mac. I test situation when extension is disabled, so I uncheck(disable) it in Safari Preferences, but cannot check(enable) it again. Safari shows me message:
Safari detected an app or service that interfered with clicking.
To protect your privacy and security, this extension was not turned on. After quitting the app or service, you can try to turn on this extension again.
[Safari message][1]
Please help to understand the problem and solve it.