Does iPhoto 9 work on Mojave?
Before upgrading my Macs to Mojave, I'm checking to see if iPhoto 9.x runs ok on it. We have not moved to Photos and have reasons to want to remain on iPhoto for the time being.
iMac Line (2012 and Later)
The only version of iPhoto that works on Mojave is iPhoto 9.6.1. Is that the version you are using?
Some users reported a few glitches with this version after the recent update to macOS 10.14.2, but for me, iPhoto 9.6.1 is still working well.