I\'ve just updated to Visual Studio 2015 Update 1, and I\'m getting the error whenever I start debugging:
Internal Diagnostics Hub Exception. See log
Enabled the logging as described in other answer and saw this error:
C:\Users\\AppData\Local\assembly\dl3\EGKO838X.JT9\LMBXB9JW.4DO\4eeaf665\00d85bfc_f9cad101\WebViews\PerformanceDebuggerSwimLanesView.manifest.json' not found.
But the file PerformanceDebuggerSwimLanesView.manifest.json exists in C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\CommonExtensions\Platform\DiagnosticsHub\WebViews. Solution is to run Visual Studio as Administrator, no more Internal Diagnostics Hub Exceptions.