Error: Could not add PlayMakerLegacyNetworking proxy

[ThrowawayAccountForForum]

Hello! I'm not quite sure what happened, but I've updated an older project to both the latest Unity and Playmaker versions and now I keep getting the following error, preventing me from getting any further.

Code: [Select]

Could not add PlayMakerLegacyNetworking proxy!
UnityEngine.Debug:LogError (object)
HutongGames.PlayMaker.FsmProcessor:OnPreprocess (PlayMakerFSM) (at Assets/PlayMaker/FsmProcessor.cs:27)
PlayMakerFSM:AddEventHandlerComponents () (at C:/Projects/Playmaker_1.9.1/Projects/Playmaker.source.unity/Assets/PlayMaker/PlayMakerFSM.cs:466)
PlayMakerFSM:Init () (at C:/Projects/Playmaker_1.9.1/Projects/Playmaker.source.unity/Assets/PlayMaker/PlayMakerFSM.cs:294)
PlayMakerFSM:Awake () (at C:/Projects/Playmaker_1.9.1/Projects/Playmaker.source.unity/Assets/PlayMaker/PlayMakerFSM.cs:245)

Does anyone have any ideas please?

I've already tried both reinstalling playmaker from the asset store, and deleting my project's library folder.

[djaydino]

is this an older project?
as its version shows 1.9.1

[ThrowawayAccountForForum]

is this an older project?
as its version shows 1.9.1

Yes. This is an older project that I have pulled from the grave and am trying to resume.