Installation Welcome Closing with 1618

I'm using version 4.1.3 with the snippet:

Show-ADTInstallationWelcome -CloseProcesses "PanGPA", "PanGPS" -ForceCloseProcessesCountdown 3600
Show-ADTInstallationProgress -StatusMessage "Global Protect is installing, please wait before connecting to VPN."

I've deployed this to ~30 devices via Intune. All but 7 completed with out issue. On the 7 with problems, I find this in the logs:

It never gets to the actual installation and appears that Show-ADTInstallationWelcome itself is exiting with code 1618. The logs show that the Intune retries the install 3 more times, with five minutes between, but each time it exits the same way. My first thought was the Show-InstallationWelcome command is checking if other MSI processes are busy, but it doesn't seem like that could be it after checking the MsiInstaller log on the affected computers: Get-WinEvent -ProviderName MsiInstaller. I remember a feature in past versions that allowed the install to wait for the MSI server to be available but I don't see that parameter any longer.

"The dialog box will timeout after the timeout specified in the config.psd1 file (default 55 minutes) to prevent Intune/SCCM deployments from timing out and returning a failure code. When the dialog times out, the script will exit and return a 1618 code (SCCM fast retry code)."

Show-ADTInstallationWelcome · PSAppDeployToolkit

Perfect. Thank you, thank you. Updated that in config.xml to 6000 seconds with my timeout in Intune at 120 minutes.