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These are very generic Store App Error Codes which could potential mean anything. Nevertheless we see a strong correlation if SSL Inspection is active for the affected Client(s)

Manager is installed but Agent Installation is failing - 0x800704EC; 0x80190193 - AppLocker

The TrueDEM Manager logs are indicating that the destination location for the msixbundle app (local device) could not be opened/accessed.  This is due to AppLocker.
Please add an exclusion rule for the TrueDEM App. https://learn.microsoft.com/en-us/windows/security/application-security/application-control/windows-defender-application-control/applocker/configure-exceptions-for-an-applocker-rule

Manager is installed but Manager Logs shows a http 407 Event

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The EventViewer provides further useful hints when it comes to Store Installation/Update issues. These are the following entries underneath of \Application and Services Logs\Microsoft\Windows\Appx*

AADSTS50158

This error code can mean a lot. Please execute the following powershell code to identify if the error is related to an outdated Microsoft AAD Broker Plugin

Get-AppxPackage | Where { $_.Name -eq 'Microsoft.AAD.BrokerPlugin' }