Try running it manually from here:
Please provide me with a snapshot from Ps->Help->Update->Preferences.
Please confirm your ACR version from Help->About Plugin->Camera Raw and provide us with the following logs.
You can find them at:
ACR Installer logs
Program Files(x86)\Common Files\Adobe\Installers
/Volumes/%Volume Name%/Users/%Username%/Library/Application Support/Adobe/AAMUpdater/1.0
You can zip all the files together and send us through mail. This would help us in finding the root cause.
Appreciate your help. Apologize for the inconvenience.