Manage subinventory and locator task grayed out

Summary:

Dear All,

We want to give access to specific users to update the item subinventory assignment, this users are primarlily defining the item and mapping it to the location (Subinventory) and they wont have warehouse manager role assigned.

I have created a custom role and assigned 'Inventory administration dulty' along with 'execute setup tasks' previlage but the task is still grayed out.

Content (please ensure you mask any confidential information):

Please suggest what is missing. attached the screenshots as well for your reference.

LDAP and import user roles has also been completed.

Version (include the version you are using, if applicable):