Fast Box Blur Missing

I opened up an ongoing project today and was greeted with this warning.
Apparently Fast Box Blur is not installed. I tried reinstalling AE but this did not fix the problem. I checked the AE folder and all the Fastboxblur.*** files seem to be where they should be (I compared with the previous version of AE which still had FBB available).
Has anyone else had / fixed this problem?
After Effects 2024.3
Windows 10 Enterprise 22H2
