DariuszKaminski Hello!
First of all, please change the ID in the unit settings to set the one that you write you have defined on id.wialon.net (027045862166)
Then please configure your tracker for the required server and port.
For the specified tracker, if your tracker supports the DNS server format, configure it to:
Server - 12741.flespi.gw
Port - 26731
If it does not support, then please try to configure it on the server IP format (to see it in the application, click on the IP button next to the server value in the settings):
Server - 193.193.165.37
Port - 26731