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I already even ff'd the adventure I was playing at the time of the update, and have no active match, whenever I try to play another battle on PoC it says "matchmaking failed".

Anyone else having this issue or knows how to fix it?

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5 months ago - /u/TinyEric - Direct link

Hi all, so we are pretty sure that this is a result of you being in an active Path of Champions match when our patch rolled out this morning. Even though you quit the game, we keep that TPOC match live for awhile, in case you were disconnected or things like that. So your old game, still active on our server, is using the old data game version, and your client is updated with the new game version. That's where this mismatch is coming from.

So unfortunately you'll have to wait till that old match times out (usually 90 minutes to ~4 hours) before you can play.

If you write into Riot player support with your player ID, we can try and speed that up for you.