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We’ve tried everything to resolve our issue, including reinstalling the game, logging out and back into GOG, restarting the router, and opening ports, but nothing seems to work. We’ve attempted both invite-only mode and using the invite code, but when we select the other user and click “Invite,” the invite window simply resets and prompts us to make a selection again.

Any suggestions would be greatly appreciated!
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One invites, the other joins or accepts?

What OS, praytell are you both on?