The devtool console
Click Help->Toggle Developer Tools->Console
The engine
To get Tabnine's log, in VSCode, please open the extension settings
and enter a path on ‘Tabnine: Log File Path’. Set it to something like /path/to/logs/.
Then restart IDE and wait for the problem to happen.
You'll find a file named filename_rCURRENT.ext-<pid> in the given directory.
A video guide: