Verification failed: Your Apple ID or password is incorrect.

Every time I try to update an app, I get greeted with the “Sign in to the iTunes Store”. After I do that, it tells me that my Apple ID or password is incorrect. Problem is, this is the only Apple ID-related thing where my password doesn’t work. I have tried changing my password, using cellular data, setting date and time to set automatically, turning my phone off and back on again, and even updating to the latest IOS. All of these have failed. Until this is fixed, I am unable to update any apps.