In ArcGIS Online, the Change Style symbology setting fails to display the output image when the security for virtual directories is enabled on ArcGIS for Server with GIS tier, built in users and roles, and the item has been added with the credentials stored with the item.
This issue has been fixed in the ArcGIS Online 3.8 update.
対処法
1) Disable security on ArcGIS for Server virtual directories (in the Admin server endpoint, Home > Security > Config > Update > False).
2) Do not store the credentials with the item in ArcGIS Online.