Playmaker missing assembly reference

[marche4ever]

Hello, I installed playmaker on another machine, which I use SourceTree to track my changes. Today I tried to checkout the branch on another machine, but when I launch editor, i get 999+ errors from playmaker missing reference. How do I fix this? And how to make sure the same error doesn't happen when I pull branch from another machine?
I also installed other unity packages, but only playmaker is giving me error.

[Alex Chouls]

Do you have visible meta files checked in Unity Edit->Project Settings->Editor?
https://docs.unity3d.com/Manual/ExternalVersionControlSystemSupport.html

Also, make sure the PlayMaker dlls in Assets/Plugins/PlayMaker are checked in.