Locate the disabled_plugins.txt file
Windows:
C:\Users\YourUserName\AppData\Roaming\Google\AndroidStudioX.X\disabled_plugins.txt
macOS
~/Library/Application Support/Google/AndroidStudioX.X/studio.vmoptions
Linux
~/.config/Google/AndroidStudioX.X/studio64.vmoptions
Where X.X is your android studio version.
Delete the file or the offending line within the file.