Anyone know why this is happening?

Numbers and letters are missing, I cant understand why.

Looks like a font issue, try changing the skin in preferences and see if that helps

If it doesn't, then reinstall the game or ask someone if they'll upload the FM font files for you to manually install. Try the skin change / reinstall game first though

I had this recently when I installed some kits. Close the game and then right click it on steam and click 'Verify Game File Integrity' (I think that's its name, maybe a varying combo of those words) then reload the game