We might get the below error while trying to install the profiler in the Plugin Registration Tool.
“Unable to Install the profiler”
“Unhandled Exception: System.InvalidCastException: Unable to cast object of type ‘Microsoft.Xrm.Sdk.Entity’ to type ‘CrmSdk.PluginType’. at Microsoft.Crm.Tools.Libraries.OrganizationHelper.InstallProfiler(CrmOrganization org, String prtPath) at Microsoft.Crm.Tools.PluginRegistration.OrganizationControlViewModel.<>c__DisplayClass302_0.<InstallProfiler_Clicked>b__2(Object o, DoWorkEventArgs e)”
On closing the window we will get the below message “Profiler install failed”
Well we can ignore this error, just click on Refresh
After the refresh is completed,
we can see that the profiler has got installed successfully, even though we got the error.
Hope it helps..
Nishant Rana's Weblog 
THANK YOU!!!!
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