Performed all steps:
Ver 1.3.1.2
8/26/2020 6:03:17 PM
Microsoft.Xna.Framework.Content.ContentLoadException: Error loading "Monocle\MonocleDefault". This is not a compiled content file.
at Microsoft.Xna.Framework.Content.ContentReader.PrepareStream(Stream input, String assetName, Int32& graphicsProfile)
at Microsoft.Xna.Framework.Content.ContentReader.Create(ContentManager contentManager, Stream input, String assetName, Action`1 recordDisposableObject)
at Microsoft.Xna.Framework.Content.ContentManager.ReadAsset[T](String assetName, Action`1 recordDisposableObject)
at Microsoft.Xna.Framework.Content.ContentManager.Load[T](String assetName)
at Monocle.Draw.Initialize(GraphicsDevice graphicsDevice)
at Monocle.Engine.LoadContent()
at Celeste.Celeste.LoadContent()
at Microsoft.Xna.Framework.Game.Initialize()
at Monocle.Engine.Initialize()
at Celeste.Celeste.Initialize()
at Microsoft.Xna.Framework.Game.RunGame(Boolean useBlockingRun)
at Monocle.Engine.RunWithLogging()
8/26/2020 6:03:14 PM
System.Runtime.Serialization.SerializationException: Binary stream '0' does not contain a valid BinaryHeader. Possible causes are invalid stream or object version change between serialization and deserialization.
at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run()
at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
at Celeste.UserIO.Deserialize[T](Stream stream)
at Celeste.UserIO.Load[T](String path, Boolean backup)
I'm not certain why it considers the MonocleDefault.xnb file " not a compiled content file" and can't read it.