Why I can’t build files from Tiled (follow image)?
I already set Reference at Content. (Monogame.Extended.Content.Pipline.dll)
Edit:
This is fixed in the current develop branch of MonoGame.Extended. however the NuGets for that are not available on the official NuGet feed. You’ll need to use the private MyGet feed that MonoGame.Extended provides.
More info here: Method not found: 'Microsoft.Xna.Framework.Color.get_TransparentBlack()' · Issue #807 · craftworkgames/MonoGame.Extended · GitHub
Original Post:
This is due to a regression bug in MonoGame 3.8.1.303 where the value Color.TransparentBlack was removed.
I say regression bug, but its sortof not really. That color value was previously marked as deprecated and was then removed with the latestet MonoGame release.
MonoGame.Extended needs to be updated to not use that value. You can see it in the error message where it calls Color.get_TransparentBlack