Could not load file or assembly 'StructureMap.Web, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Solution:
The StructureMap-reference had a path to "..\packages\structuremap.web-signed.3.1.6.191\lib\net40\StructureMap.Web.dll"
I removed reference and added a new one to "..\packages\structuremap.web.4.0.0.315\lib\net40\StructureMap.Web.dll"
The references should look like this:
Structurmap.web is either missing or refering to the old 1.0 so replace this...