Power BI Report Server upload error

This was in the RSHostingService log when I tried to upload the pbix file again.

2017-05-30 10:16:08.3426|INFO|8|Throttled restart of process by 239,180.92ms: PowerBI
2017-05-30 10:16:08.3426|INFO|8|Launching Process : PowerBI
2017-05-30 10:16:08.3426|INFO|8|Starting Process: C:\Program Files\Microsoft Power BI Report Server\PBIRS\PowerBI\RSPowerBI.exe
2017-05-30 10:16:09.1597|WARN|18|Child Process [PowerBI] Died. Check the log for further information

This was in the RSManagement log at the same time:

2017-05-30 10:16:08.7476|TRACE|7|Received request NT SERVICE\PowerBIReportServer GET http://localhost:8083/api/v1.0/ManagementState| RequestID = s_44f8a9e7-dd1d-41f8-b366-f547d6296e47
2017-05-30 10:16:08.7476|DEBUG|7|MeteredSqlConnection: Connect to Data Source=DEVDB1;Initial Catalog=RSPowerBI;Integrated Security=True;Application Name=RSManagement| RequestID = s_44f8a9e7-dd1d-41f8-b366-f547d6296e47
2017-05-30 10:16:08.7646|DEBUG|7|MeteredSqlConnection: Connect to Data Source=DEVDB1;Initial Catalog=RSPowerBI;Integrated Security=True;Application Name=RSManagement| RequestID = s_44f8a9e7-dd1d-41f8-b366-f547d6296e47
2017-05-30 10:16:08.7646|DEBUG|11|MeteredSqlConnection: Connect to Data Source=DEVDB1;Initial Catalog=RSPowerBI;Integrated Security=True;Application Name=RSManagement| RequestID = s_44f8a9e7-dd1d-41f8-b366-f547d6296e47
2017-05-30 10:16:08.7646|WARN|11|Changing Symmetric key| RequestID = s_44f8a9e7-dd1d-41f8-b366-f547d6296e47
2017-05-30 10:16:08.7646|TRACE|11|Sending response. Response code NT SERVICE\PowerBIReportServer 200| RequestID = s_44f8a9e7-dd1d-41f8-b366-f547d6296e47