Join the same server through the console.

I'm having the same issue. Went from LV21 back to 4 on my first day. Went for P1 LV45 last night, back down to P1 LV29 today. I just wanna progress naturally and legit like the good ol' days and I'm worried about MW3 doing the same since progression is slower on there. Until we get a definitive answer: I found playing one public game after you change class/scorestreak/profile stuff can help 'save' your progress before you exit the game. But I don't know if it's 100% reliable.

Custom game is just privet match you can still get achievements if your on steam that's how my friends play vanilla bo2

Check my comment from here: https://forum.plutonium.pw/topic/39666/error-during-initialization-invalid-patch-fastfiles-please-verify-your-game-files-with-steam/2

thats sick, i wished there was, but once its back as an optional thing, imma start exploring on these maps

delete whats in zm folder then delete everything in AppData\Local\Plutonium\CrashDumps

@Kombat-Chief ty bro, this was the solution

I know this thread is pretty old, but wanted to share my experience. To get Plutonium working for me in Linux (Arch), all I did was download the exe and added it to Steam as a non-Steam game. Once I did that, I downloaded my CoD MP titles from Steam (using Proton Experimental as my compatibility). I created a /home/myUser/Games/Plutonium directory and inside that directory, I symlinked the CoD directories that Steam created from the CoD MP downloads. I did this because the Plutonium Setup would not allow me to enter the .steam directory in my home for, but once I created a directory and symlinks that the Plutonium exe could view, Setup was a breeze. I then added the Plutonium exe to my Application Manager (in KDE) so that I could add the Plutonium launcher icon on my task bar. Doing it this way, eliminates the need to use Wine or Lutris and was honestly, the easiest setup I have had for getting Plutonium to work on Linux. Hope this helps anyone who finds it!

A friend of mine had the same thing happen to him and he solved it by selecting the folder again but if it doesn't work for you install the Microsoft Visual C++ Redistributable files

@nasr-werfali2002 if u have a cpu with integrated graphics try to see if the game is running on ur dedicated gpu and not the igpu, and then see if u got any driver updates hopefully this helps even on a topic this old