Getting error running action building my first automation

I installed HA days ago and just learning the system. My first automation was to perform a backup and upload it to Dropbox. Backup runs, upload to Dropbox does not. When I try to kick off the upload step, I get the below error. I’m including output from the logs as well. I confirmed with the documentation and the URL that the slug is correct, so unsure if I’m just formatting something wrong? Copied this from the documentation and seems simple enough. . . What am I missing?

[140555935018304] Error handling message: Not a valid add-on slug for dictionary value @ data[‘addon’]. Got None (invalid_format)

websocket_api script: Error executing script. Invalid data for call_service at pos 1: Not a valid add-on slug for dictionary value @ data[‘addon’]

Add-on is running and this is the URL - /hassio/addon/719b45ef_dropback/info