I have loaded a solution developed in a older visual studio version in my local visual studio 2017. There are many reference to external dlls. When I compile the solution I get error as below despite the fact that the dll's are available under the "packages" folder in the solution. The target framework of the projects in the solution are set to .NET Framework 4. I have .NET Framework 4.7.1 installed in my computer. I would appreciate some help on this.
Updated with project file
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