What I suspect it is, based on seeing your site and how it behaves in my browsers (tried both Firefox and Safari), is that you're using the HTML5 player as the default for all/most browsers. It's not recommended for anything other than Safari and Chrome.

Go into the plugin settings for the JW player and try different settings. Or if you uploaded a different player, you may have to put the original one back in. Just now, when I turned on HTML5 for the "not recommended" browsers, my player then looked exactly like yours and I received similar errors to yours... this is why I suspect you need to look at those settings or replace the file with the original one.

i replace all plugin files but not working ,
and in plugin setting i select No for all options

still i have this problem

but witch plugin i must use for fix this problem

fixed

problam was aceSEF componets it was Use non-SEF variables option is Yes
i changed to no is work
this option ib acesef is deactiving (format=feed, type=rss) variables
and that variables is request for MC