How to fix "System.ServiceModel.ServiceActivationException" ?

Hi,

 

I hit this url in Sharepoint 2010 "http://servername/_vti_bin/listdata.svc/" using Postman, but they give me the error message : "Status:500, System.ServiceModel.ServiceActivationExceptio".

 

"http://servername/_vti_bin/listdata.svc/" , this URL give the all lists of sharepoint.

 

How to fix this?

Thanks in advance!