I have a site based on Umbraco 8.6. All works fine, I use Chrome on content editing and all it's ok. But if I use Internet Explorer (version 11, I don't want to use it, but the customer not uses Chrome or Firefox, only IE...sigh), the richtext disappears. The console js reveal this error:

TypeError: Object doesn't support 'closest' property or method at link (http://localhost/umbraco/js/umbraco.directives.js?cdv=1754279839:14944:17) at Anonymous function (http://localhost/umbraco/lib/angular/angular.js?cdv=1754279839:1389:11) at Anonymous function (http://localhost/umbraco/lib/angular/angular.js?cdv=1754279839:11263:34) at invokeLinkFn (http://localhost/umbraco/lib/angular/angular.js?cdv=1754279839:11269:9) at nodeLinkFn (http://localhost/umbraco/lib/angular/angular.js?cdv=1754279839:10588:11) at compositeLinkFn (http://localhost/umbraco/lib/angular/angular.js?cdv=1754279839:9835:13) at nodeLinkFn (http://localhost/umbraco/lib/angular/angular.js?cdv=1754279839:10582:11) at compositeLinkFn (http://localhost/umbraco/lib/angular/angular.js?cdv=1754279839:9835:13) at publicLinkFn (http://localhost/umbraco/lib/angular/angular.js?cdv=1754279839:9700:30) at link (http://localhost/umbraco/lib/angular/angular.js?cdv=1754279839:29824:9)