I have been having issues with CU13 as well. At this point I wouldn't proceed with that installation.
I agree with Mre Martin to run the setup command he stated, however you can't run that command in the Exchange Management Shell. Instead run it from an elevated command prompt. I've had more success installing Exchange using the unattended method than I ever had using the GUI through double-clicking setup.exe.
ASKER CERTIFIED SOLUTION
i got this resolved by opening ticket with Microsoft support.