I can work around this, as I managed to find an older version of Ecosystem that works.
Havent been on Unity for a while. But. This bit me twice recently, so I will post it here, in case Im missing something obvious.
Started a fresh Unity project, using 2017.1.0f3 on MacOs Sierra 10.13.4.
Unity installed Playmaker 1.8.9 for me.
Then when I try to install the latest Ecosystem 0.68, after the installation I get two errors the same:
Assets/net.fabrejean/Editor/PlayMaker/Ecosystem/EcosystemBrowser.cs(96,31): error CS0234: The type or namespace name `Ecosystem' does not exist in the namespace `HutongGames.PlayMaker'. Are you missing an assembly reference?
When I restart Unity, Playmaker obviously stops working all together.
I tried searching online for help, but got mixed findings and nothing to clearly solve this one... yet.
Again. I can work around it by installing an older version of Ecosystem.
cheers