I am using Visual Studio 2013 Premium. Out of nowhere, the NuGet package manager console stopped working. Now it displays only Not found after a failed powershell initialization.

I tried reinstalling NuGet, restarting, deleting the folder with the NuGet extension.
Does anyone have an idea what could be causing this, or at least how to find out why this is happening?
Update: This is detected in ActivityLog.xml
Not found at System.Management.Automation.Internal.PipelineProcessor.SynchronousExecuteEnumerate(Object input, Hashtable errorResults, Boolean enumerate) at System.Management.Automation.PipelineNode.Execute(Array input, Pipe outputPipe, ArrayList& resultList, ExecutionContext context) at System.Management.Automation.StatementListNode.ExecuteStatement(ParseTreeNode statement, Array input, Pipe outputPipe, ArrayList& resultList, ExecutionContext context)
visual-studio-2013 nuget
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