Latest master + excavotor & pwsh
Tested 30 may 2018 Master from link you send me.

It ran all night on default NVIDIA only, disabled cpu and amd in start.bat.
Everything ran good except excavator that started in benchmark mode and did not exit, so ended up running for 3 hours while other benchmarks ran parallel.

pwsh starts to download for the 356th time and refuses to complete or exit.
I tried PWSH -fo and /update as alternative to -i options but loads too many times.

Maybe have a seperate pwsh install script and once in downloads folder can point to local folder in star.bat , download once, use many times from local.

Only Excavator and PWSH errors i could see.