Hi.
I have the same issue, all of a sudden my normal install process for Office 365 apps now fails.
Two things that I have noticed (no, I haven't found a full solution yet).
If you go to the portal.office.com page and download the set up tool, it is a different version than the one mentioned as the current Office deployment tool.
The web site portal.office.com downloads version Setup_16.0.18129.20016, but the official deployment tool found at
https://www.microsoft.com/en-us/download/details.aspx?id=49117 is 16.0.18129.20030.
Now, the second thing that I noticed is hard to explain.
My install bat file contains the command "OfficeSetup.exe /configure NewConfiguration.xml" with the xml file and all of the source files and the setup exe in one folder, but the bat file doesn't work if you double click it.
BUT, if I open CD (run as administrator) and navigate to the directory where all of the source files are and paste the command "OfficeSetup.exe /configure NewConfiguration.xml" then the setup fires up and completes the install.
I have noticed though, that when I double click on the bat file windows prompt for UAC, and then launches a second CMD and install, and its possible that that second command window is not providing the path to the xml file.
If I run the bat file as administrator then it opens and closes and fails to install.
I'm still fishing for a more complete solution, because obviously double clicking is the most suitable install method for me for a mass deploy.
Thanks
Take care
George S