Steps to reproduce

• create a publisher user called `testuser`
• assign `testuser` non root access to test workspace (using ACL), do not allow write permission on root of workspace or any sub-folder
• let `testuser` create an item for the test workspace and click save button using default dialog
• dialog configuration attached disclaimer.yaml

Expected results

• Content saved to JCR

Actual results

he gets the following error with error.log

RpcInvocationException: Unable to invoke method click in com.vaadin.shared.ui.button.ButtonServerRpc
caused by InvocationTargetException
caused by MethodException: Invocation of method buttonClick in info.magnolia.ui.dialog.ActionButton$$Lambda$2083/0x00000008417bc840 failed.
caused by RuntimeException: info.magnolia.ui.api.action.ActionExecutionException: Action execution failed for action: commit
caused by ActionExecutionException: Action execution failed for action: commit
caused by RuntimeRepositoryException: javax.jcr.PathNotFoundException: /__TMP_ORDER_STORAGE
caused by PathNotFoundException: /__TMP_ORDER_STORAGE

If that same component is saved by a superuser user, no error occurs

Workaround

No.

Development notes

• Note from Support investigation: When user saved content, the function applyOrder of DefaultJcrNodeOrderHandler has been called. In that function implementation, a TMP_ORDER_STORAGE created under Root node for temporarily order storage.
• In case user lacks of Root access permission, the issue occurs.
• Reference code:
• https://git.magnolia-cms.com/projects/PLATFORM/repos/ui.pub/browse/magnolia-ui-framework-jcr/src/main/java/info/magnolia/ui/editor/DefaultJcrNodeOrderHandler.java#99
• try to use the same path or use also a system session, if having two is not a problem