In the launcher, when I press play to start Minecraft, a popup window comes up saying 'Game already running'; 'Already running in this directory' and 'Already joined the game as this user'. Minecraft Launcher was the only thing open, and I restarted my PC a couple of times, to no avail. When I press 'Continue anyway' I am unable to join any servers and it tries to connect but an 'Invalid session' error shows up. This means I am only able to play singleplayer. And by the way, I don't know what the versions in 'Affects Version/s' mean. so I selected all of them.
Thank you for your report!
We're actually already tracking this issue in MCL-12955, so I've resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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