Hi,
you did not do any back up? make sure you always make backups, even for small increment update, and here you moved from 2017 to 2019, that's a huge jump and I don't recommend to do that in one go, here's how I upgrade projects from so many versions apart:
- backup and try on a copy
- download and import the latest version of playmaker first, verify project works
- upgrade to the closest LTS unity version, so from 2017 you go to 2017 TLS, verify it works
- import playmaker again, things get shuffled based on the unity version, so it's best to always make sure you have imported playmaker within that version
- upgrade to 2018 LTS, verify it works
- import playmaker again, verify it works
- upgrade to latest 201, verify it works
import playmaker again, verify it works.
it's tedious, but I could bring back very old projects this way. you may get messed up packages from the package manager, and that's a bummer, if that happens, you will need to mess up with removing and adding back the packages you need.
and of course, the goes with any other assets from the asset store, especially ones with scripts. so upgrade incrementally
can you pm me with your playmaker invoice, I'll then get in touch with Alex to see if we can get you that version.
Bye,
Jean