Powershell ISE Crashes on Launch

Question

Not sure why, but today my workstation refuses to load the Powershell ISE. I can load Powershell just fine and my cmdlets work. I've tried loading both the 32bit and 64bit ISEs and both crash for the same reason.

This is the crashdump:

Problem signature: Problem Event Name: PowerShell NameOfExe: PowerShell_ISE.exe FileVersionOfSystemManagementAutomation: 6.1.7600.16385 InnermostExceptionType: System.Xml.XmlException OutermostExceptionType: System.Reflection.TargetInvocation
DeepestPowerShellFrame: indows.PowerShell.GuiExe.Internal.GPowerShell.Main DeepestFrame: indows.PowerShell.GuiExe.Internal.GPowerShell.Main ThreadName: unknown OS Version: 6.1.7600.2.0.0.256.48 Locale ID: 1033

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I couldn't find anything on google on this crash so I'm hoping someone here has some guidance.

Answer 1

This may be completely unrelated but in my case, I didn't understand much when I looked through Process Monitor to determine what was causing the crash as a windows update (cherry picked by our Helpdesk team), broke my PowerShell ISE launch, I also tried running without a profile. with Powershell_ISE -NoProfile

I followed the techcommunity thread and was able to fix my issue with Solution #3 GlobalUserInterface.CompositeFont from dotnet github issue

All I had to do was download this font and update it at below locations, PowerShell ISE is a WPF Application and Fonts were corrupted by dotnet upgrade as a part of KB4074906

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\WPF\Fonts and C:\Windows\Microsoft.NET\Framework\v4.0.30319\WPF\Fonts