Same here...
been fighting all the may updates across the board
60 computers, some update fine, others fail with varying errors.
Tried local install downloaded and copied
tried manage.autodesk.com updates
Tried updating users to Access...
Re Revit 2023.1.2 in particular this one is worse than the others. users have the formitConverter looking for an msi in MY user profile (my bad, IT imaged a laptop I set up. one would think a new user would get new registry settings... do I really need to)
Just tried using Access to upgrade mine.. failure with the results noted above
only thing the log file shoes is
Bundle: Revit 2023.1.2 Update, Installation Failure in Bundle: Revit 2023.1.2 Update
Application Name : Revit 2023.1.2 Update, Package Name : Revit 2023.1.2 Update
Error code : 2
Will try stopping core, rebooting and redo. will post results tomorrow