Not being able to use the AutodeskBIM360DocsConnector transformer

You'll probably have to verify that the redirect URI specified in the web connection is exactly the same as the one specified in the Autodesk BIM360/ACC console.

Thanks @david_r​ 

I'm getting this error when trying to add a web connection.

Normally, I clicked on add web connection, then on authenticate and I'm supposed to be redirected on a signing page for Autocad Cloud Construction instead of an error message.

I haven't entered anything on the list options parameters so I don't know where to verify redirect URI that you are referring to.

You'll need to look at the web service configuration, not the connection. In FME Workbench, look under:

Tools / FME Options / Web connections / Manage services

See also https://docs.safe.com/fme/html/FME_Desktop_Documentation/FME_Desktop/!NamedConnections/options_web_service_connections.htm#Viewing,