The night mode add-on creates invisible text
The Night Mode add-on for the computer version of Anki has a bug that can cause your card text to be set to white. The text appears correctly when using the add-on because the background is black, but when you go to view the text on another device, the text disappears because it is the same colour as the background.
You can fix your existing cards by:
- Selecting all of your cards in the Browse screen
- Using the Find&Replace option in the Notes or Edit menu.
In the search field, type:
color: rgb(255, 255, 255)
Leave the replacement as blank, and choose OK.