SCCM Cloud Management Gateway Error: Task [CreateDeployment for service (CMG NAME)] has failed

I recently encountered this error while standing up a ConfigMgr CMG for a client, the error isn't obvious until you delve a little deeper into the log files. I'd instructed SCCM to create a new Azure resource group for the CMG, but it kept failing. CloudMgr.log ERROR: Resource Manager - Failed to finish deployment. Check [Monitor/Activity log] on Azure Portal for more information ERROR: Resource...