1. Click on your account picture and select Settings from the dropdown menu.
  2. In General settings section, check Yes after Show hidden items.
  3. Go to Manage > Projects.
  4. Open the Group projects folder where the hidden folder/project locates:
    1. Open subsequent folders/subfolders if the hidden folder/project was not stored in the main folder.
    2. Hidden projects/folders are in faded colors.
    3. Hidden entries are framed by red rectangles.