Weird Could not load file or assembly error using DocuSign

I have a .net framework project with framework as 4.8. Recently I integrated docuSign 5.12 using a class library and nuget packages. Everything worked fine in development. When I published the exe in server, I am getting could not load file or assembly error. I cleared the references, reinstalled docusign, changed copy to output property to true for all and published again. But same result.

What I noticed is, when installing .net framework in server, it didn’t create a folder called .Netframework in ‘c:\Program Files(x86)\Reference Assemblies\Microsoft’. As the required dependencies missing are system dependencies, they are not copied to published folder.

So, I have another server where .net 4.8 SDK is present and everything worked fine there. My questions are

1. Why didn’t installation in server didn’t create assemblies?
2. Do we need to install .net 4.8 SDK for this to work?
3. How to publish dependencies for these kind of Nuget packages?

I have not added code samples as it is working already. Dependencies are https://www.nuget.org/packages/DocuSign.eSign.dll/5.12.0#dependencies-body-tab.

You can use the publish functionality of VS. It will package your app, including all NuGet dlls and their dependencies and send it to server. If you use Azure - it's integrated into the process. You can even include it in a CI/CD process. But your specific problem can be addressed by just having VS publish the app to your server instead of you manually copying files over there.

As per the comment from Ralf, I checked the references. Found an interesting thing. I already had a binding redirect in the project but, it was added to the class library config file but not the startup project config file. Because of that, my API was referring to old Newtonsoft version. I copied redirect from class library config to my main project config and it started working.