I installed PyRevit per your instructions on the Revit Kid video. I downloaded the pyRevit_4.8.4_signed.exe and ran the installation with no apparent errors. I then ran Powershell like you suggested ...

OS: Window 10 Version 1809 (OS Build 17763.379) pyRevit Version 4.6.24 pyRevit Environment: Open a command prompt and run the command below. Replace these lines with the results. Take a look at this ...