I'm getting this error when i'm running Kentico upgrading tool.
CMS\web.config was modified by a user and needs to be handled manually.Message: Unable to update xml element. Element on '/configuration/system.web/compilation/assemblies/add[@assembly = "System.Net.Http, Version=126.96.36.199, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"]' was not found.
I only changed the connectionString in web.config file. Please suggest.
The issue is caused most likely by a duplicate .sln file in the project root. For some reason the upgrade tool creates new .sln file. Removing one of the .sln files fixes the issue.
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