I cannot use the app because I can't read the text.

The whole of Libre is dark black, I can’t see what the text says, I’ve tried to change the overall theme but it won’t save the changes I’ve made. Is there something I can do about this, make the background of the whole app white of some color that makes it so I can read the f***in text.

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If you are able to see the main libreoffice window…

  • Click Tools Tab
  • Left Pane - LibreOffice/Application Colors/
  • In the Automatic combo box (upper right), try switching to “Light” or “Dark” (“System Theme” is default)
  • Click “Apply” button then “OK”. Close LibreOffice
  • Try opening a Libre document again to check visibility…
  • Repeat if necessary, trying a different Automatic theme in the Application Colors.