Open one of your projects.

Click on the "Groups" button.

Click on the "Create Page/Post From Group" button.

Click on the "Page" radio button to create a page for a group.

Click on the "Post" radio button to create a post for a group.

Click on the "Create All" button.

Wait for the pages/posts to be created.

Refresh the page and reopen the same project.

Check that pages for groups were created.

Check that posts for groups were created.