Make sure you’re using your “username” not your email as your username
Make sure you’re using your “username” not your email as your username
Try spamming the space bar on startup and choosing an older kernel
Pop Os uses SystemD and not GRUB
Make sure you’re using you “user name” and not your email address
You can tap the top of the screen to take you to the top of most iOS scrolling apps
I managed to login after having the same issues. Turns out my password manager was filling in my email address and not my user name.
Might have to right click and make sure it’s executable, then double click it to install.