None of my tiles nor my background is visible anymore. Help, plz

This is an image for reference. This just now started happening and I do not know why. I've restarted my browser and it still occurs, it was working fine a few minutes ago, now I can't view any of my pages/dials. Clicking on the tiles themselves takes me to their page fine, but it's a gamble as to what I'm clicking on exactly unless I hover my mouse over the tile for a few seconds for it to show it's Title Name.