Hi
Check that addon is working fine in Server. If it is working copy the below file from server and past in Client System with administrator login.
Server Path:
Copy the file from here:
"C:\*\SAP\SAP Business One\Conf\b1-local-machine.xml"
Client Path:
"C:\*\SAP\SAP Business One DI API\Conf\b1-local-machine.xml"
Also Check the below Note
Please see SAP Business One Note 1785166.
Regards
Balaji Sampath