When you install or update your SketchUp plugin, it is very important to close all SketchUp windows and restart SketchUp. Otherwise you may see an error like this when loading:
Error: #<Errno::EACCES: Permission denied @ unlink_internal
If you see this error:
- Close all SketchUp windows and restart.
- If that doesn't work, restart your computer.
These steps will fix the error for most users. If you are still having trouble, you should check if you have a cloud storage app such as Dropbox or Onedrive which might be trying to sync the file. Or, your anti-virus software might be trying to access the file which could also cause the permission error.
If you are still having problems after trying the above solutions, please submit a request.