I manually entered a storage account name ("jenkinsvmagents_storage") and clicked "Verify Template" which worked properly and said that the template was verified.
However upon the deployment of an agent, there is an ARM Deployment failure in the portal:
|Field||Original Value||New Value|
|Resolution||Fixed [ 1 ]|
|Status||Open [ 1 ]||Resolved [ 5 ]|
|Status||Resolved [ 5 ]||Closed [ 6 ]|
|Component/s||_unsorted [ 19622 ]|
|Component/s||azure-vm-agents-plugin [ 21950 ]|