fix(authentication) language display problem resolved #9385 (#9390)

react/features/authentication/components/web/WaitForOwnerDialog.js

 import { Dialog } from '../../../base/dialog';
 import { translate, translateToHTML } from '../../../base/i18n';
 import { connect } from '../../../base/redux';
+import { safeDecodeURIComponent } from '../../../base/util';
 import { cancelWaitForOwner } from '../../actions.web';
 
 /**
     const { authRequired } = state['features/base/conference'];
 
     return {
-        _room: authRequired && authRequired.getName()
+        _room: authRequired && safeDecodeURIComponent(authRequired.getName())
     };
 }