When I updated the latest PHPStorm, it marked as incompatible.

[Alexander-Yi]

Not compatible with the version of your running IDE (PhpStorm 2021.3.3)

[edclement]

I had this same issue with when updating to WebStorm 2021.3.3. Restarting the IDE seemed to fix it...

It's also interesting that on the plugin page here it states:

[goranmandiccrs]

I had this same issue with when updating to WebStorm 2021.3.3. Restarting the IDE seemed to fix it...

It's also interesting that on the plugin page here it states:

Thanks. This saved me a lot of headache!

[WegPast]

Restarting no longer workaround on 2022 phpstorm version.
I use this one now (I think it a fork) : https://plugins.jetbrains.com/plugin/17017-codeglance3

[ShikaiWang-Sky]

I changed to CodeGlance Pro, and it works on the latest version of Webstorm