Scheduled Refresh of Report on Locally Hosted Repo...

I am trying to host a report and get it to update daily with new data. Right now, I have all of the data on the PowerBI service as dataflows or under a dataset. When I use these data sources (which are already updating daily), within my report PBIX file, and I upload it onto the web URL for others to view, I cannot schedule a refresh for that report. It says I don't have any external data connections defines or am using an unsupported data source. I have several API queries making up all of my data. Need to figure out how to get these refreshing all the way through to the report on the host server every night. Is this possible? How do I get this flowing properly?