Fix crash in player loading(FEV-76) (#3474)
Fix crash in player loading(FEV-76) (#3474)

wrong CSS path caused resource loader to crash
kaltura/mwEmbed,FlixMaster/mwEmbed,omridevk/mwEmbed,FlixMaster/mwEmbed,omridevk/mwEmbed,kaltura/mwEmbed,kaltura/mwEmbed,kaltura/mwEmbed,FlixMaster/mwEmbed,omridevk/mwEmbed,FlixMaster/mwEmbed,omridevk/mwEmbed