Check your engine version & Check your plugin version
Are both updated? (Especially the engine version)
Does this occur on multiple IDEs?
Yes - continue to step 3
No - Reinstall Tabnine plugin on this IDE.
If the problem still there, follow Error working with Tabnine
Remove all Tabnine files from the following paths:
the binary files (according to Binary location by OS) & Models location & Config file location
Reinstall Tabnine. Make sure you have the latest versions.
Did nothing work?
See Error working with Tabnine