The remote server returned an error: (404) not found error in powerBI

I'm currently experiencing an issue where I cannot publish a report to the online service. Its an import model using an excel workbook as the data source. I have published this previously to the online service, but had to make some changes, and haven't been able to upload it since. 

I'm not sure if it is being caused by certain changes in the report, or if there is another problem. 

I have tried uploading it to OneDrive, and pulling to the service from there, but I get a different error.