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=22.214.171.124, 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.
Please, sign in to be able to submit a new answer.