How to set up the configuration correctly:

As the system admin in Salesforce, navigate to the Files section, click on the Libraries tab, and then click "New Library" in the top right.

Create a Library with the specific name GetAccept Shared Folder, give it a description, and click Save. It is important that the name is exactly as stated above.

Add a file or files that you wish to include in this library

When inside the library, you can click on Manage Members to select which users within your org you wish to have access to this library.

Next, click on App Launcher and search for GetAccept Admin to open the admin app.

Inside the admin app, click on Setup, and then navigate to User roles.

In this section, check the boxes on the user roles for Access GetAccept shared folder you wish to be able to access this folder. (The user should also have Member access previously granted within the library)