Error "Could not load file or assembly 'Newtonsoft.Json or one of its dependencies" occurs every day

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I get the following error every day:

Exception information: 
Exception type: FileLoadException 
Exception message: Could not load file or assembly 'Newtonsoft.Json, Version=4.5.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

I can temporarily fix it by renaming the dll and then reverting the rename. I've check the web config for the proper assembly redirect:

<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-4.5.0.0" newVersion="4.5.0.0" />

I have also checked the file assembly version number and that is 4.5.0.0 It's version 5.0.8 of the Newtonsoft.Json package.

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How is it possible that this error keeps occurring everyday? What are the possible causes?

This problem seems to be fixed now. I manually cleaned the entire solution locally and also on the webserver. And did a clean deployment.

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