Works in Dev but Bust in Production

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.

Start by reproducing the ASP.NET MVC deployment on Windows Server 2019, comparing the development and production runtime environments, including the VS C++ Redistributables and System32/SysWOW64 placement. Confirm the production deployment generates a non-empty output file and record any runtime or architecture differences found.

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