Just an FYI, ttrpg.network has updated to 19.2. There's apparently some potential issues with cached logins, and you must delete your cookies/cache, or log out and remove and readd your account to most apps. Let me know if you have any other problems.
Thank you! After a few days of difficulty logging in and assuming I was going something wrong, I thought I’d check the site directly.
I was able to fix it by deleting and reinstalling the app.