This looks like you have two or three versions of the MxModelReflection library installed. It looks like you’ve renamed one MxModelReflection_2 and the other MxModelReflection_3, but haven’t renamed any of the classes inside, so they are clashing with the other copies.
The solution is to remove the MxModelReflection_2 and MxModelReflect_3 folders, leaving only one MxModelReflection.
I hope this helps.