Can't connect WHMCS to WHM after the last update

This post may help SOLVED - WHMCS integration problem after upgrade to 74

 

The announcement of the depreciation and removal of the XML output was announced over a year ago - so no - there is now no quick fix other than to upgrade your WHMCS

One suggestion was to build a new server on a pre v74 of cPanel, and migrate your site over to that - I would have thought it would be more trouble than it was worth, and it would be easier to just update your WHMCS.

 

What to do when you're using the latest version of WHMCS and setting up servers (v74+) only to get that same error using the API token? The module log shows this:

Code:

{"cpanelresult":{"apiversion":"2","error":"Access denied","data":{"reason":"Access denied","result":"0"},"type":"text"}}

I tried creating the key as both root and reseller it's to connect as, with the same result.

UPDATE:
As is typical, I fiddled with things some, and somewhere in the middle of it all things began working. Inexplicably. Reseller username and reseller generated key seems to be what it wants. Not sure which change on the server made it happy, but it now works on more than one.