Oh, I accidentally followed you. Anyway, have you tried logging in incognito? Perhaps the problem lies in your browser. If it didn't work, try changing your password. If there's no "Reset Password" button. Try contacting Mangago directly via email. Let me know if it worked!
If you can't access the account you should try find the profile and your want to read list should be public
Sometimes it just bugs, I have similar problems from time to time and you just have to log a few times in a row and it will accept after few tries
So, I broke my old phone and now I can't log into my old mangago account for some reasons, I mean, I know my user and password but keeps telling me to try again or that there's a problem and come back later. I have like thousands of ma/ngas/nhwas/nhuas saved that I've accumulated for 3-4 years. Im having this annoying deja vu feeling everytime I remeber the plots of my favorite ones but just can't remember the names!! Is there like a way to access it any other way? I have like a good 2k on my "want to read" tab.