T-Mobile Samsung Galaxy S7 update signed me out of all accounts, and can't sign back in

[AC Question]

I downloaded and installed the T-Mobile system update for my Samsung Galaxy S7 yesterday, and ever since then I haven't been able to use half of my apps. Half of my apps got signed out,and I can't sign back in. When I try to sign into my Google apps, it asks me to re-enter my password for security purposes, and when I get to the two-step verification, the prompt to hit yes doesn't appear, and when I try to verify using my phone number, it produces an error and repeats the cycle. When I opened my soundcloud, it said that you can't have more than one account active at a time, then closed. When I typed in my groupme password, the app automatically crashes. When I log into reddit, it automatically signs me out. I tried clearing data/cache of all of my apps, and removing my soundcloud accounts from the accounts tab on settings, which signed me out. But when I enter my email and password, it simply says "error." I can log in fine on all my web browsers fyi, it's just my phone. Any help please?! It's frustrating not being able to use half of my apps.