The specified location does not contain Interop.PeachwServer.dll. Please browse to the location where Sage 50 is installed on this computer.”

This is a Sage 50 Interop error.

1. Navigate to the folder where the Sage 50 Program is, i.e. C://Program Files/Sage/… 

2. Find the '''Interop.PeachwServer.dll''' file

3. Copy the link address to that file and paste it into the Install Location box, and click Submit.