collapse expand shortcut +/- not working (windows 10, newest chrome, paid version)

Hi, just purchased upgrade.

Some of the shortcuts are not working. Some I don't mind, I would probably not use them. However collapse expand with +/- do not work neither and I would really like to use that. 

Other extensions should not be able to tinker with the behavior of other extensions as far as I know. What else could blocking the functionality?

Thanks