Error: Element link is missing required attribute property

I have fixed my websites others w3c error But still showing these error
Error: Element link is missing required attribute property
<link rel=’stylesheet’ id=’jcarouselresponsive-css’ href=’http://mydomain.com/wp-cont…der/css/jcarouselresponsive.css?ver=d05b044ee8cbfafc2fc4d788c9303a17&#8242; type=’text/css’ media=’all’ />

Error: Element link is missing required attribute property
<link rel=’stylesheet’ id=’style-admin-css’ href=’http://mydomain.com/wp-content/plug…logo-slider/css/style-admin.css?ver=d05b044ee8cbfafc2fc4d788c9303a17&#8242; type=’text/css’ media=’all’ />

Can we are help me how to fix these error

https://wordpress.org/plugins/easy-logo-slider/