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Queue Service: Could Not Load File or Assembly

posted Jun 23, 2017, 7:42 AM by Eric Patrick
A QBO client recently encountered the following error:

Error in ProcessTimerElapsed; Error Processing Managers; QueueManager.Process; QueueManager.Initialize; Error initializing modules in QueueManager QBO; Unable to initialize configuration for qbo/ObjectType; Unable to initialize configuration for qbo/Abstract; Unable to initialize configuration for qbo/ConfigurationEntry; Could not load file or assembly 'Newtonsoft.Json, Version=10.0.0.0, 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)

The root cause was an earlier version of Newtonsoft.Json was in the root folder of the website. 

See the SO answer.
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