Hello, I encountered the same situation. After I deleted a lot of files, I found that there was a cs file that may have caused this problem. This file came from another third party plugin (Easy Movie Texture v3.59)
// General Information about an assembly is controlled through the following
// set of attributes. Change these attribute values to modify the information
// associated with an assembly.
[assembly: AssemblyCopyright("Copyright © Ruslan Balanukhin 2015")]
// Setting ComVisible to false makes the types in this assembly not visible
// to COM components. If you need to access a type in this assembly from
// COM, set the ComVisible attribute to true on that type.
// The following GUID is for the ID of the typelib if this project is exposed to COM
// Version information for an assembly consists of the following four values:
// Major Version
// Minor Version
// Build Number
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
// [assembly: AssemblyVersion("1.0.*")]
My version of UMotion is 1.08
I have used the following version of unity:
All have this problem
My mother tongue is not English. This reply comes from translation software. Please forgive me and hope to help you reproduce this problem.