Connecting OpenHab - TheThingsNetwork

Hello,

Thank you for your answers/advices.

One colleage has tried the connection from his PC at his home and the broker works correctly so the issue must be in my PC.

I have reinstalled everything, openhab, Zulu. I have also tried the connection from my mobile connection and the result is the same

Does anyone has some idea about what can i configure/desconfigure in my pc?