Elementor Not Loading

I have installed the plugin of Elementor page Builder. I want to use it only to create landing pages. The case is that it does not stop loading. I have tried with another topic, have looked that this deactivated the visual publisher, I have proved with insole canvas and have deactivated all the plugins. In another blog it has worked to the first one. All the tools have been loaded, but in this one already do not be that to do to eliminate this failure. I have looked at the documentation of the plugin and it seems that nobody has had this problem. Thank you.

2 errors:

1- Failed to load resource: the server responded with a status of 404 (Not Found)

2- Uncaught DOMException: Failed to read the ‘contentDocument’ property from ‘HTMLIFrameElement’: Blocked a frame with origin “http://www.coachexito.com” from accessing a cross-origin frame.
at HTMLIFrameElement.contentDocumentDesc.get [as contentDocument] (<anonymous>:66:14)
at contents (http://www.coachexito.com/blog/wp-admin/load-scripts.php?c=0&load%5B%5D=underscore,shortcode,utils,jquery-core,jquery-migrate,backbone,wp-util,wp-backbone,media-models,plupload,wp-plupload,jquery-ui-c&load%5B%5D=ore,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,mediaelement,wp-mediaelement,media-views,media-editor,media-audiovideo&ver=4.8.2:10:26888)
at Function.map (http://www.coachexito.com/blog/wp-admin/load-scripts.php?c=0&load%5B%5D=underscore,shortcode,utils,jquery-core,jquery-migrate,backbone,wp-util,wp-backbone,media-models,plupload,wp-plupload,jquery-ui-c&load%5B%5D=ore,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,mediaelement,wp-mediaelement,media-views,media-editor,media-audiovideo&ver=4.8.2:10:3613)
at a.fn.init.n.fn.(anonymous function) [as contents] (http://www.coachexito.com/blog/wp-admin/load-scripts.php?c=0&load%5B%5D=underscore,shortcode,utils,jquery-core,jquery-migrate,backbone,wp-util,wp-backbone,media-models,plupload,wp-plupload,jquery-ui-c&load%5B%5D=ore,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,mediaelement,wp-mediaelement,media-views,media-editor,media-audiovideo&ver=4.8.2:10:27001)
at n.onPreviewLoaded (http://www.coachexito.com/blog/wp-content/plugins/elementor/assets/js/editor.min.js?ver=1.7.11:2:30537)
at HTMLIFrameElement.dispatch (http://www.coachexito.com/blog/wp-admin/load-scripts.php?c=0&load%5B%5D=underscore,shortcode,utils,jquery-core,jquery-migrate,backbone,wp-util,wp-backbone,media-models,plupload,wp-plupload,jquery-ui-c&load%5B%5D=ore,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,mediaelement,wp-mediaelement,media-views,media-editor,media-audiovideo&ver=4.8.2:11:12444)
at HTMLIFrameElement.r.handle (http://www.coachexito.com/blog/wp-admin/load-scripts.php?c=0&load%5B%5D=underscore,shortcode,utils,jquery-core,jquery-migrate,backbone,wp-util,wp-backbone,media-models,plupload,wp-plupload,jquery-ui-c&load%5B%5D=ore,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,mediaelement,wp-mediaelement,media-views,media-editor,media-audiovideo&ver=4.8.2:11:9173)