After clicking 'Sign in' on Tabnine Hub, signing in does not work.
Do you get a blank screen or be redirected to Tabnine Hub without signing in?
Restart your IDE & Restart your machine.
Check your devtool > console logs. Do you get any errors?
Do you use a proxy? A firewall? An antivirus?
Do you have any connectivity issues?
Please follow this guide
Perhaps you need to update the certificate?
Please see the article named DST Root CA X3 Expiration
* Is your OS version: Ubuntu 20.04 LTS? Do you use Firefox?
See this issue
If nothing resolves the problem, Please follow this guide