Failed to initialize the PowerShell host. If your PowerShell execution policy setting is set to AllSigned, open the Package Manager Console to initialize the host first.
You got error like this or simular: Package Installation Error Could not add all required packages to the project. The following packages failed to install from 'C:\PROGRAM FILES (X86)\MICROSOFT VISUAL STUDIO 12.0\COMMON7\IDE\EXTENSIONS\K4NWZ1KQ.YDX\Packages': EntityFramework.6.0.0 : Failed to initialize the PowerShell host. If your PowerShell execution policy setting is set to AllSigned, open the Package Manager Console to initialize the host first. Newtonsoft.Json.5.0.8 : Failed to initialize the PowerShell host. If your PowerShell execution policy setting is set to AllSigned, open the Package Manager Console to initialize the host first. EPiServer.Framework.7.15.0 : Failed to initialize the PowerShell host. If your PowerShell execution policy setting is set to AllSigned, open the Package Manager Console to initialize the host first. EPiServer.CMS.Core.7.15.0 : Failed to initialize the PowerShell host. If your PowerShell execution policy setting is set to AllSigned, o
