I created a new user group "manager" with all permission checked. then created a new user with the manager's permission. Then tried to export the expenses. It's not exporting anything. I didn't select a specific warehouse for the manager user, to get access to all warehouses ( As per your answer in my previous question.). I tested the same in your demo also. It's the same result. In the List expenses, there is no filter to choose a specific warehouse also.

Many (not all) exports are having some kind of issues.

List products - No issues
List sale - No issues
List purchase - No issues
List quotation - No issues
List expenses - Not generating the excel file and no warehouse filter option
List transfer - Access denied and no warehouse filtering option
List Return - No export option at all