You could possibly run command prompt as administrator then launch the PlexConnect.py file or you may need to fix permissions as @drewbie said on the entire folder and sub folders so all the files can fire allowing PlexConnect to run all the required files so it can run.
Ok. I was able to change permissions for the folder and have it running now. But I get the error ‘cannot connect to trailers’ . Other apps like Netflix are working ok though
I followed the guide but missed the install certificate on atv part. I remember doin it last time but didn’t see it in the guide this time and just ended up googling it.