"There was an unexpected errror with the login session"

So i know this is a bug thats been around for a while and that the are fixes for it the problem is none of these fixes work.

A couple days ago i was in a TFT game and our internet shut out and i got caught in an infinite round of tft, when my internet came back up every other application on my PC was running fine but it logged me out of league and crashed the client and i have not been able to log in since.

ive done the "logout" ive gone to end the killer network but the problem is the logout trick isnt working and the service isnt running in the first place. ive reset my router, got a new ip address, still nothing is working, i can still log into runeterra but not league, yes ive unistalled and reinstalled as well

if theres any other solutions please help!