This article applies to:
MultiStore
Configuration Error: Could not load file or assembly 'System.Web.Abstractions'
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Symptoms
When accessing a MultiStore 9.1.0.1+ site, a configuration error occurs:
Parser Error Message: Could not load file or assembly 'System.Web.Abstractions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.
Cause
The Microsoft .NET Framework 3.5 Service Pack 1 is not installed on the server.
Solution
Install Microsoft .NET Framework 3.5 Service Pack 1 on your server. If the site is hosted, please contact your server host to verify and perform the update, or move the site to an updated server.
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