Share a library to group problem

Hello

I am newly on Seafile.
I have a problem, i can sync my all groups from our Active Directory.
But when i want to share a library to a group, i can not see group names on share group tab.
Also i tried to create a group on seafile. I can see them but when i give a permission to group, it is not working. When i click the submit button, i did not see anything below of the page.

Please help me for that.

Best regards.