When browsing for the Library to import, be sure you've selected the folder that ends with .library and not the contents of that folder. If you select that folder, your Library contents should load correctly. If you select a folder or item within that folder, the contents of the Library may appear blank.
This will also occur if the library is created in the new version of Library and then opened in an older version of Library. New versions of libraries are not compatible with Library version 1.0.5 and lower. Please be sure your team updates to the most current version of Craft Library.