What exact version of AE are you using? Is it 18.104.22.168?
If you uninstall the plugins from that directory, you're still getting the same message? What about if you remove them from the directory and then reboot your computer?
Already tried. I've also reinstalled AE
Are you using AE version 13.8?
Removing the plugins still pops up the same message?
Have you contacted Red Giant support?
Removing the plugin removes it completely. It occurs with other plugins too, although it didn't a while ago.
Edit: Error occurs in both 13.7.2 and 13.8