When you click the “Delete All” button on the K2 Artefacts page in SharePoint, the artefacts are deleted from the K2 Artefacts page but are not deleted from the K2 Designer along with SharePoint Smartobjects and relevant categories.
- Ensure you have K2 Five RTM installed.
- Get the K2 Five RTM FP18 from Regional Support.
- Install the K2 Five RTM FP18 to apply the fix.
- It is recommended to refresh the browser cache.