On a new clone and build, I get about 35 "Failed to create importer" errors.
I noticed that all the Content.mgcb files reference this package:
"/reference:.........nuget\packages\monogame.extended.content.pipeline\3.9.0-alpha0001\tools\MonoGame.Extended.Content.Pipeline.dll"
Whereas the actual projects reference the latest stable version 3.8.0, not 3.9.0-alpha0001.
On a new clone and build, I get about 35 "Failed to create importer" errors.
I noticed that all the Content.mgcb files reference this package: "/reference:.........nuget\packages\monogame.extended.content.pipeline\3.9.0-alpha0001\tools\MonoGame.Extended.Content.Pipeline.dll"
Whereas the actual projects reference the latest stable version 3.8.0, not 3.9.0-alpha0001.
Fixing that path fixes the build for me.