Added this package to Unity project from Git URL, then tried to add the ADSR Envelpope.cs script to an obect and was shown this message; "Can't add script component "ADSR Envelope" because script ...

Instead of decompiling and recompiling the game's code, we instead import the assemblies directly into Unity, as plugins. However, when we try to import the game's assembly, it all seems OK, until we ...