I've been trying to deploy a webconnector to quickbooks premier plus 2021 with webconnector 2.3R000036 on a machine that has the server and client on it and getting the error in the title.  After troubleshooting for hours I finally removed both the server and client and just reinstalled the server and the problem went away with webconnector yaay.   But this quickbook file needs to be accessible from multiple users and I need this webconnector to run on this machine with the server and the client unfortunately since they don't have another machine and we remote in and do stuff with the webconnector. Is there another way to run the server and client on the machine and not cause this error?   Do I really need the server to use multi-user mode?