Normally, when you need to update PowerShell's help, you just run the command Update-Help.

However, since PowerShell v7, an error has crept in when you run Update-Help.

Update-Help: Failed to update Help for the module(s) 'Dism, Kds, NetQos, PcsvDevice, PKI, Whea, WindowsUpdate, WindowsUpdateProvider' with UI culture(s) {en-US} : One or more errors occurred. (Response status code does not indicate success: 404 (The specified blob does not exist.).).                                                                            English-US help content is available and can be installed using: Update-Help -UICulture en-US.                          Update-Help: Failed to update Help for the module(s) 'HgsClient, HgsDiagnostics' with UI culture(s) {en-US} : A Help URI cannot contain more than 10 redirections. Specify a valid Help URI..                                                   English-US help content is available and can be installed using: Update-Help -UICulture en-US.                          Update-Help: Failed to update Help for the module(s) 'IISAdministration' with UI culture(s) {en-US} : Help content cannot be found. Make sure the server is available and the help content location is properly defined in the HelpInfo XML..   English-US help content is available and can be installed using: Update-Help -UICulture en-US.                        

Even when you run the command: 

Get-Module -ListAvailable | Where HelpInfoUri | Update-Help

you'll still encounter the same error as above.

To fix it, you'll need to run the following command:

Update-Help -Verbose -Force -ErrorAction SilentlyContinue