[2022] Cant claim clan key?

Your Clan Key is connected to your Clan membership. When you leave your Clan, keys that were owned OR in the process of being built are removed.  You will need to make a new Clan Key in your foundry (you get a new blueprint when you join a Clan).   I do not see a pending Clan Key being printed on your account, so if you see this in game, relaunch Warframe and it should disappear.  The real issue here is how you managed to leave your clan in such a way that the Foundry didn't update.  😅