Could not load file or assembly "office...

The Reddoxx Addin crashes and various exceptions are thrown.
This could be one of the following list:
Could not load file or assembly office

In most cases, the user is not allowed to access one or more required DLL Files.
The required Files are mentioned in the Application Error Log
Windows stores DLL Files in the so called global assembly cache
Depending on your system, this could be either "%SystemRoot%\assembly" or "%SystemRoot%\Microsoft.NET\assembly"

Check the above mentioned folders and corresponding subfolders for the file that is reported as faulty or missing
If for example the office.dll is missing, search for the office.dll that might be located here:
C:\Windows\assembly\GAC_MSIL\office\\office.dll or C:\Windows\assembly\GAC_MSIL\office\\office.dll (this depends on the office version)
If the file is available, make sure that the desired user has read access to the file
If the file cannot be found in the subfolders of the global assembly cache, the installation of the addin, the office version or even .net could be corrupt and needs a fresh reinstallation