missing instruments in rack,not loading

hi, does anyone have this problem? I updated to 6.0.3 and all projects that i made on this version is missing instruments in the instrument rack when loading the project. The instruments are … groove agent one, halion one, maschine , geist.

I switched back to 6.0.2 and some projects made on 6.0.2 are missing instruments on the instrument track when loading.
I have the instruments, but they’re not loading with the project. cubase 6.0.2 and 6.0.3. Thx