CrystalDecisions.CrystalReports.Engine DLL

You can download the SDK at http://scn.sap.com/docs/DOC-7824. Be sure you get the right architecture. It sounds like you've already done that. In your project you should click on the DLL in References and set Copy Local to true so that the DLL will also be found on your production machine. If that's not working, I need a little more information about what's going on.

You can install it by going to Tools > NuGet package manager > Manage NuGet packages for solution Packages in ASP.NET in VS 2014. (Sample- you can create a webform and right click and you can find manage NuGET and install it). Even I had the same issue