rupamdcpl

From last few days when I am trying to open “Text Block” using Visual Composer from the backend then it is not opening and gives the below error in the chrome console.
All plugins are updated in the site.
Current WordPress version: 4.7.3
Error::
Uncaught TypeError: Cannot read property ‘refreshContentEditable’ of undefined
at B.<anonymous> (plugin.min.js?wp-mce-4403-20160901:1)
at t.i [as fire] (tinymce.min.js?ver=4403-20160901:8)
at B.fire (tinymce.min.js?ver=4403-20160901:8)
at B.setContent (tinymce.min.js?ver=4403-20160901:11)
at B.load (tinymce.min.js?ver=4403-20160901:11)
at B.show (tinymce.min.js?ver=4403-20160901:11)
at Object.d [as go] (editor.min.js?ver=4.7.3:1)
at vc.Storage.setContent (backend.min.js?ver=5.1:6)
at vc.Storage.save (backend.min.js?ver=5.1:6)
at vc.Storage.update (backend.min.js?ver=5.1:6)
(anonymous) @ plugin.min.js?wp-mce-4403-20160901:1
i @ tinymce.min.js?ver=4403-20160901:8
fire @ tinymce.min.js?ver=4403-20160901:8
setContent @ tinymce.min.js?ver=4403-20160901:11
load @ tinymce.min.js?ver=4403-20160901:11
show @ tinymce.min.js?ver=4403-20160901:11
d @ editor.min.js?ver=4.7.3:1
setContent @ backend.min.js?ver=5.1:6
save @ backend.min.js?ver=5.1:6
update @ backend.min.js?ver=5.1:6
sync @ backend.min.js?ver=5.1:6
save @ backbone.min.js?ver=1.2.3:1
create @ backbone.min.js?ver=1.2.3:1
createElement @ backend.min.js?ver=5.1:3
dispatch @ jquery.js?ver=1.12.4:3
r.handle @ jquery.js?ver=1.12.4:3

How to fix the issue?