The assembly "{0}" referred to by add-in component "{1}" could not be found in the add-in package. This could be due to the ...

The assembly "{0}" referred to by add-in component "{1}" could not be found in the add-in package. This could be due to the following reasons:

    1. The assembly was not included with the add-in package.
    2. The AssemblyName attribute for the add-in does not match the name of the add-in assembly.
    3. The assembly file is corrupt and cannot be loaded.