+1
I am also having this issue. The first WYSIWYG area displays correctly, but the the ones following after that do not display because of the JS error.
Error: Uncaught TypeError: Cannot read property ‘body’ of undefined
Line: wp-tinymce.php?c=1&ver=4401-20160726:12
Stack Trace
getBody @ wp-tinymce.php?c=1&ver=4401-20160726:12
add_events @ input.min.js?ver=4.4.8:2
init @ input.min.js?ver=4.4.8:2
(anonymous function) @ input.min.js?ver=4.4.8:2
each @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-widget,wp-a11…:2
each @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,jquery-ui-core,jquery-ui-widget,wp-a11…:2
(anonymous function) @ input.min.js?ver=4.4.8:2
