Hi there,

It is same with this thread https://stackideas.com/forums/upload-video-link . Have you check with your current web hosting service provider regarding this issues?

Or maybe you the one that handle those server, you can refer here or you can submit a ticket to your web hosting service provider and provide this link https://www.webtoffee.com/resolve-errors-like-call-to-undefined-function-mb_detect_encoding/ as well.