Hello,
Reason of not having content types in the list:
1. The Link to Document content types has been added
2. Feature related to the content types has not been activated
Since Link to Document is default content type, then reason #1 is probably the most reasonable. You may also select incorrect content types groups, so in that case try to select all content types.
Best regards,
Riwut Libinuko
SharePoint Architect, Singapore
Microsoft MVP | SharePoint Server | Singapore
Blog : http://blog.libinuko.com