After obfuscar: new .exe cannot find the connectionstring?


I used obfuscar to modify my .exe-file.
I did that using the command prompt. It created a directory with a new .exe and mapping.txt file.
I copied both of them to the debug folder and tried to run the .exe file.
However…now it gives an error…see image: Cannot find the connectionstring. Does anyone know how to solve this?
I didn’t have this problem with the .exe in the debug file (without obfuscator). Hope anyone can help!
I use c#, Windows Forms.NET-project and a sql database.

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Source: Visual Studio Questions