It works
When should i switch back into release version ?
or, Should I stay in Beta version for permanent?
Test page link is here :
https://www.iducation.tv/foliovision-test-hls-steaming-video/
and for more investigation I also installed another vanilla wordpress with the same current version and the same FV player plug-ins in the subdomain website, which occur the same technical term error.
if you want to see more technical issues inside, I will give you an admin access to the sub-domain website.