[18:07:59] [Craft Scheduler Thread - 2/INFO]: [AuthMe] Downloading GEO IP database, because the old database is older than 30 days or doesn't exist
[18:07:59] [Craft Scheduler Thread - 2/WARN]: [AuthMe] No MaxMind credentials found in the configuration file! GeoIp protections will be disabled.
[18:07:59] [Craft Scheduler Thread - 2/INFO]: [AuthMe] There is no newer GEO IP database uploaded to MaxMind. Using the old one for now.
[18:07:59] [Craft Scheduler Thread - 2/WARN]: [AuthMe] Could not download GeoLiteAPI database [FileNotFoundException]: plugins\AuthMe\GeoLite2-Country.mmdb (Nie można odnaleźć określonego pliku)

An error occurs when starting the server.
Standalone server with SQLITE
Spigot: 1.12.2
[AuthMe] Loading AuthMe v5.6.0-SNAPSHOT-b2373
[ProtocolLib] Enabling ProtocolLib v4.5.1-SNAPSHOT-b445

No MaxMind credentials found in the configuration file! GeoIp protections will be disabled.

You'll have to register a key on the MaxMind site, cf. #1979 (comment) and then set them to the config.yml