SPGO Error when trying to connect to SP On-Prem

Question

I am new to SPGO and trying to use on SP On-Prem 2016 in a corp environment. I do not have to sign into SP but am authenticated via CAC. I chose NTLM but was prompted for my credentials so I don't know what the password is since I don't have to enter one. I then tried the "AddinOnly" method and was able to supply a client ID, entering "", secret: "", and realm: "". I did this by first registering an app and generating that info. That got me a little closer (or so it seemed). My workspace resides in C:\Users\myName\SPSites

SPGo.json setup: { "sourceDirectory": "src", "sharePointSiteUrl": "https://fake.com/sitename/site", "workspaceRoot": "c:\Users\myName\SPSites", "publishWorkspaceOptions": { "destinationFolder":"/", "globPattern":"c:\Users\myName\SPSites\src*.", "localRoot":"c:\Users\myName\SPSites\src" }, "publishingScope": "SaveOnly", "authenticationType": "AddinOnly", "remoteFolders": [ "/siteassets/" ] }

app permissions:

     <AppPermissions AllowAppOnlyPolicy="true">
     <AppPermissionRequest Scope="http://sharepoint/content/sitecollection" Right="FullControl"/>
     </AppPermissionRequests>

VSCodeVersion: 1.65.0 SP On-Prem: 2016

It says Starting File Synchronization when I try to populate workspace and it just hangs with Populating Workspace (bottom left) just spinning. Eventually I get an error about the workspace.

Also got this error, which is new: Output: syntax error: Unexpected token m in JSON at position 363. Might just be my typing. So I did populate workspace again and entered app credentials (client id, etc). It is now just hanging, Starting File Synchronization ... Populating Workspace