I installed the app on my iPad, but can't see any text when I type in the site/username/password; how do I fix this?

3 quick answers to resolve this -

"hey Siri, turn off Dark Mode"

swipe down diagonally to open Control Center, hold your finger down on the brightness indicator. Tap Dark Mode On to turn it off.

tap Settings > Display & Brightness > Automatic (which will activate dark mode after the sun sets, but leave it off during the day)