Unable to create Folders or Layers inside the Maps Corporate Folder

Folder Administrator — Grants users and profiles the ability to create, organize, and manage folders within the shared Corporate folder. A Folder Administrator can set Folder Permissions for a user or profile against any corporate sub-folder located in the sidebar of Salesforce Maps.

Steps to enable Folder Permissions:

1. Open the Salesforce Setup menu, and type Installed Packages in the Quick Find search bar.
2. Select Installed Packages, find Salesforce Maps, and click Configure.
3. Select the Permissions Group tab on the left pane and click on New button to create a new Permission Group. Give a meaningful name to this Permission Group.
4. Click Edit button to edit the new Permission group
5. Check "Folder Administrator" under Layers section.
6. Next, go to the Assignment tab and assign the profile or user to this Permission Group and click Save.

Note - If you already have a custom Permission Group created for the profile, you can edit that Permission Group instead and check “Folder Administrator“ and save.