@l33t4opera & @leocg: Thank you for your replies. Enabling opera://flags/#chromium-ua-compatibility is working, so I will contact the website admin in the next days.

@l33t4opera & @leocg: Thank you for your replies. Enabling opera://flags/#chromium-ua-compatibility is working, so I will contact the website admin in the next days.

Hi, at this website I get with every video I try to start an 500 error, but only with Opera DEV. Other browsers are working. Resetting all settings did not helped.
https://www.arte.tv/en/ -> select one video -> https://www.arte.tv/500/500.html
Opera 67.0.3574.0 developer & Opera 67.0.3564.0 developer
Windows 10 Home build 19546.1000 x64