Works in Dev but Bust in Production

[6Hat]

Got this working in development fine... however when I deploy it (An Asp.Net MVC Framework app) I cannot get it to work. Worse yet it does not generate any exceptions but simply outputs an empty 0kb file! I could not install VS 2015 C++ Redistributable as I already have VS 2017 C++ Redistributable. I also put the 32 and 64 bit versions in the corresponding locations i.e. System32 and SysWow64 which worked in dev. Am I missing something else? Any help would be greatly appreciated.

Also note that I am running on Windows Server 2019 thanks.

[lilith]

Have you tried this C runtime? https://aka.ms/vs/16/release/vc_redist.x64.exe