Win Server 2019 (17733) - changing developer settings fails with rundll32 error

%3CLINGO-SUB%20id%3D%22lingo-sub-271371%22%20slang%3D%22en-US%22%3EWin%20Server%202019%20(17733)%20-%20changing%20developer%20settings%20fails%20with%20rundll32%20error%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-271371%22%20slang%3D%22en-US%22%3E%3CP%3EI%20am%20attempting%20to%20use%20the%20'For%20developers'%20inside%20Update%20%26amp%3B%20Security%20Settings.%20I%20click%20on%20the%20'Show%20Settings%20for%20the%20'Change%20settings%20to%20show%20file%20extensions'%20and%20get%20an%20error%3A%3C%2FP%3E%3CP%3E%3CIMG%20src%3D%22https%3A%2F%2Fsocial.technet.microsoft.com%2FForums%2Fgetfile%2F1347474%22%20border%3D%220%22%20alt%3D%22%22%20%2F%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EI%20have%20changed%20the%20ACL%20on%20this%20file%20-%20taken%20ownership%20as%20domain%20admin%20user%20-%20but%20still%26nbsp%3Bthe%20error%20persists.%26nbsp%3B%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-271371%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EGeneral%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E
Contributor

I am attempting to use the 'For developers' inside Update & Security Settings. I click on the 'Show Settings for the 'Change settings to show file extensions' and get an error:

 

I have changed the ACL on this file - taken ownership as domain admin user - but still the error persists.  

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