Talkgroups are handled entirely by the server, you don't need to set them up on the M1KE.
By default, the M1KE resolves TG IDs using the BrandMeister TG ID-name database, alternatively you can switch this preferred talkgroup list to the TGIF database on the web interface on the Settings page, at the DMR settings section: https://manuals.sharkrf.com/m1ke/web/settings/advanced.html#mode-settings
We can add the talkgroup list to our database if you provide us the link of the talkgroup list in a computer parseable format (preferably JSON) which our database can use for its daily updates.
If you mean that you can't connect to the server, then check the device log on the Status page of the web interface for connection details. Make sure you switch the Homebrew/MMDVM connector to MMDVM protocol mode.