Your mobile user does not have Read access in their security profile to the objects that are included in the drill-down hierarchy for the Jobs they've been assigned.
- Go to Setup> Profiles.
- Click Edit next to profile the mobile user is assigned to.
- Under Custom Object Permissions, ensure that the user has at least "Read", permissions for the objects they need to pull information from out of Salesforce. If the user is assigned Jobs where they are generating records in an object, they'll need "Create" access. If they are updating records in an object, they'll need "Edit" permissions.
If the above doesn't work in alleviating the error, please contact us at email@example.com.