i connected with Dji support and got today answer:
"I got a confirmation from the relevant team and the DJI Mavic 4 Pro does not support Dongle 2 in overseas areas (non-mainland China area). That is why it will prompt that error."
PS. in Mavic...
I had Mavic 4 Pro about a week before launch, i bought dongle 2 and it worked sunrprisingly well (in Estonia). However, at launch day there was an update and its "not available in this region". So it was removed.
Its also removed from dongle...