Parse Error in ASP.NET application

I first published the website locally without precompiling it. (Precompile generates another error: Can't find the valid AspnetMergePath) And then I transfered it using FTP to the server. I get the following error. What am I doing wrong?

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Solution

Check your solution different assemblies .NET version compatibility. This looks like that kind of error, where app is not able to load an assembly

or because it can not be located How the Runtime Locates Assemblies
or because there is different .NET versions comaptibility issue.