The problem with my MVC solution was that I recently updated Nuget packages in my solution. After the update, I forgot to update
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly>
with the new dll bindings that were installed during the upgrade. Therefore, on my hosting server, due to a connectionstring problem, I did not overwrite the current .config file. So, as soon as I did the update in the assemblyBinding section of the .config file, the problem disappeared.
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