hello,
i have the same problem. The last time it was working for me was 26.01.2019 15:00. At the next day it doesnt find any links more. And the Links which it found on 26.1. i get file doesnt exist when i try to download.
On the Webbrowser it works fine
2017 had another user the same problem
https://board.jdownloader.org/showthread.php?t=74389
there was a problem with basic authentication components.
Would be very happy if you could solve the Problem.
Thanks for your help.