from a week I was updated my Android Studio version to stable version 4.0.0 then I am started getting this errors in my studio and unable to build the app.
Unable to save plugin settings: The plugin org.jetbrains.android failed to save settings and has been disabled. Please restart Android Studio But I forcefully enabled all plugins in my Studio by going to File-->Settings-->Plugins --> All are enabled.
Try that: delete the .idea folder in the android project folder where you faced this problem.
Close Android Studio. Now navigate to your projects .idea folder and rename the workspace.xml file to workspace-o.xml and delete a workspace.xml~ if it exists (i.e., AS has a corrupt workspace layout file).
This should fix the problem. Restart AS and configure the workspace back they way you like it (i.e., it will start with a simple view: View/Tools Windows/Project etc.).
I started my first project in Android Studio and my answer may not be the correct one. I ran into this problem during building the My Activity project. It always came back with this error asking me to restart. Finally I thought that the controlled folder file access is preventing me. I temporarily switched-off the protection(against Ransomware in Windows 10) and tried the Build. I stopped getting these messages. But, I have other problems I am looking into.
I deleted the .idea folder and then I invalidated the cache (file-> invalidate Cache/Restart) This fixed my issue.
