The best fix for the Prime Video Error 7131 at the moment is changing DNS to Google's 8.8.8.8 DNS, 1.1.1.1 won't help in this context. Hopefully there will be a proper fix soon from Debian/Sid side, since we know Amazon won't help. This is based the previous post on this reddit. Hope this others.
Source: r/PikaOS · by /u/CraniusBard1998