Could not load file or assembly 'Newtonsoft.Json, Version=10.0.0.0' - However binary exists in bin folder
Just had a similar issue. My website and a referenced project (I assume same for assembly) both required Newtonsoft.Json but they had slightly different versions.
Seems the website was winning out, so the site had that version installed and the referenced assembly failed to load "it's" version.
Made sure all the projects had the same version (Manage NuGet Packages for Solution) and worked.