Hi Jason,
>> Failed to update Help for the module(s) 'Appx' with UI culture(s) {en-US} : Help content contains files that are not valid.
Only .txt and .xml files are supported.
same error on my servers also with newest PS5.1.
You could use: update-help -module appx -force -ea silentcontinuy as a workaround to ignore these errors.
But, if you run: get-help some appx cmdlets -full you'll get the help file, probably not the newest.
So, i suppose if you didn't want to ignore this error, please try to download the help files then manually install it or post a feedback
on link below:
Downloading link:
https://www.microsoft.com/en-us/download/details.aspx?id=36475
Feedback link:
https://windowsserver.uservoice.com/forums/301869-powershell
Best regards,
Andy
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