FCPX not detecting audio units.

A few days ago my multicam edits would not sync. Nothin had changed in workflow. Today I realized that in the preferences Audio Units says " validate on next launch" - and when launching fcpx this exe file called "auvaltool" pops up to the right. Has anyone experienced this? Thanks in advance.

"auvaltool" is the Audio Unit Validation Tool that is used by apps to verify the Audio Units installed all meet spec and are allowed to load and function in that app. When you tell an app to re-evaluate Audio Units, that's what happens, totally normal.