Board Game Arena

I've got all the time this message on https://studio.boardgamearena.com
I can't test my game

I can't connect to studio if I'm at work that uses a proxy server.
It uses a different port or something like that 667.
You may get some useful information in the F12 debug.

Yes, probably you have a firewall blocking non-standard ports. F12 / network tab should allow you to see what is blocked and solve it.

Yes it's due to my firewall.

Thank you for your help