Hi,
The "Item coverage is not fully updated" message means master planning couldn't fully calculate net requirements for one or more items. In your case, it's most likely a consequential error caused by the "No capacity could be found" issue on your planned production order.
When the engine can't find available capacity on a resource, it can't determine the supply date so item coverage for that item and any dependent items stays incomplete.
Fix the capacity error first check the route, resource assignment, working time calendar, and whether finite capacity is enabled intentionally. Once resolved, rerun master planning and the coverage message should clear on its own.
If it persists after that, check the Infolog for other failed items could be a missing BOM version or expired coverage settings.
Regards