Ever since the most recent update to Plutonium, I've been unable to play BO2 or MW3 multiplayer. For BO2, when I click Online, it gets stuck on 'Connecting to Online Services' for a whole minute or two before eventually showing an error message saying that the servers are offline (which clearly isn't the case). This first happened to me a few days ago, and somehow I was able to fix it (I don't remember exactly how honestly) or it just fixed itself for a time, but it's happening again today.

I assumed that this problem was limited to BO2, but now it's affecting MW3 as well, and i can't even get into a private match. It just says 'Connecting to Online Services' for barely a few seconds before showing an error message. I can access the Create-a-Class menu just fine, but the error shows up whenever I try to access the Server Browser, Private Match, and even Callsign, Barracks, and Vault. Unlike with BO2, I haven't seen anything remotely helpful regarding a fix to this problem for MW3.

I primarily play with bots in private matches, but I can't even do that. I am aware that launching the games in LAN mode via the Plutonium launcher is an option, and it does bypass this problem, but it's not a permanent fix and it doesn't carry over my progress (as far as I know).
Fixes I've tried have included verifying the game files through Steam, making sure both the games and Plutonium are allowed through Windows Firewall, and launching Plutonium in administrator mode. I haven't had any internet or connection issues with any other games, and I've never had this issue prior to the most recent Plutonium version.
Unfortunately, the forums here seem somewhat inactive and any other posts about this issue or similar issues that I've seen rarely have fixes in the replies (or at least fixes that work for me), so I'm not exactly hopeful that I'll find a solution here, but I don't know where else to look for one.