I am referring to below API document to get responses. In some cases, it does not show any error via API but while checking on dashboard, it does not perform that operation and throws an error.
Example: I was using one.vm.disksnapshotcreate. It does not throws any error while performing this operation via API. When I checked on the dashboard, it was showing an error message in the logs: “Error creating new VM Snapshot: Could not create snapshot”