After enabling SSL on my script (website), chrome has a problem but not Firefox

Hello everyone,

I have a VPS server running Debian 9 with virtualmin installed.

I run a script on my server that uses the ffmpeg conversion tool. Recently, I used the Cloudflare SSL flexible certificate and my website loads normally, but when I try to convert a video, it only works for Firefox and Safari, but in Google, everything is blocked.

When I turn off SSL, Google Chrome starts working and perfectly demonstrates the conversion process, but when I re-enable SSL, it stops.

It's strange why this only happens with chrome but not with other browsers.

Please, if someone can help me solve this problem, I would be more than happy.

Thank you