Unable to play DAI Multiplayer on PC with friends

Good afternoon!

My friends and I (we're all from different regions and countries) tried to play multiplayer in Inquisition on PC, but we weren't able to connect to each other. Every time one of us tried to join a private room created by someone else via an invitation, we kept getting a server connection error. We also tried creating public rooms, but that didn't help either - we still couldn't join each other, and everyone ended up stuck in their own separate lobby. We attempted several troubleshooting steps, including clearing the EA app cache, disabling the Windows Defender firewall, and other methods, but nothing worked. Could you please advise if there are any other ways to establish a connection? What other factors could be causing the multiplayer not to work? Are there any restrictions affecting multiplayer access, and how can we resolve these issues?