Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Updating to latest version of Office 2019 (released 01-AUG-2024) using the elevated command prompt technique seems to solve the problem.
Open an administrative command prompt and then enter the following command...
"C:\Program Files\Common Files\microsoft shared\ClickToRun\OfficeC2RClient.exe" /update user updatetoversion=16.0.17830.20138
depending on your Office version, the "updatetoversion=" number may differ.