Illustration of a computer screen in a dark room displaying a large, red error message 'Not Enough Memory or Disk Space', with a background of overflowing digital folders and files.

There is not enough memory or disk space to run the grammar checker

Word (or Office in general) refusing to get proofing tools to work (spelling checker doesn’t work, spawns these odd errors, won’t find any spelling mistakes, etc).

Lots of Googling and running Microsoft “fixit” applications didn’t do much.

Simple fix: run setup of the proofing tools again, and select repair, reboot, and all should be good.