javascript errors from the tinymce that is preventing the visual editor from loading

Hi folks,

What is a workaround to prevents these errors so the visual editor will appear again?

I have WP 4.1 (updated recently) . . . Wordpress.
I am getting javascript errors from the tinymce that is preventing the visual editor from loading (when clicking the tab it is totally blank and has white space only). The text tab open fine. The media button, screen options (top right) all work fine). It appears there is a error in line 4 of the above file. This seems to be a issue when updating WP sometimes with tinymce.
How can I fix this so the visual editor will work again please?
The visual editor is the issue. When clicking on the tab for "Visual" here are the javascript errors:
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/colorpicker/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/tabfocus/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/lists/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/hr/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/textcolor/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/media/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/wpdialogs/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/fullscreen/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/wordpress/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/wpview/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/charmap/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/wpgallery/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/wpautoresize/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/wplink/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/wpeditimage/plugin.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/themes/modern/theme.min.js
tinymce...0141130 (line 4)
Failed to load: http://www.i-ras.co.uk/wp-includes/js/tinymce/plugins/paste/plugin.min.js
tinymce...0141130 (line 4)