Hey there! I'm unsure whether you were able to fix it by now but as it shows on your profile, you've already linked your Minecraft account to your forums account. My guess is that you already linked your account and now that your trying to link it again, it will give you an invalid key error as a result. In the future for smaller things like this, you would get a much faster response on the #support channel in the official MCC discord and I'd encourage asking for assistance there rather than here. As such, the problem is resolved and therefore I'll be locking this thread. Have a nice day chief!
