Error: E150-0

Today I was Downloading the app When I came along the Download For Several Games and the Ue4 its self when I clicked download it went on for a while then appeared with an error. The error said to retry but after several times trying I gave up. I Just want to know what the error is and maybe how I might be able to actual download something on the site. Also the error came up with several different ones but E150 was always part of the number. The E150-0 came up the most.