Hi,
On our 2019 server we are no longer able to PXE boot from WDS with MDT lite touch image after installing the March 19 cumulative update, kb4489899.
We are getting the following error: A required device isn't connected or cannot be accessed.
Other people are reporting this issue on server 2012: https://www.reddit.com/r/sysadmin/comments/b08coa/patch_tuesday_megathread_20190312/eifnzlq/