Remove button

The remove button on the accordions tab does not remove the section.
If I had a max of 5 accordions (free version) then click remov, the button that says add a new accordions stops being blurred out, and becomes clickable, which seems to imply that it it thinks its being removed but never does. I inspected the button on my browser and these errors came up.

Uncaught TypeError: Cannot read property ‘remove’ of null
at HTMLTextAreaElement.<anonymous> (field-wysiwyg.js?ver=4.6.6:7)
at Function.each (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils&ver=4.6.6:2)
at a.fn.init.each (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils&ver=4.6.6:2)
at Array.<anonymous> (field-wysiwyg.js?ver=4.6.6:4)
at HTMLDivElement.<anonymous> (cmb.js?ver=4.6.6:226)
at Function.each (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils&ver=4.6.6:2)
at a.fn.init.each (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils&ver=4.6.6:2)
at Object.deletedField (cmb.js?ver=4.6.6:219)
at HTMLButtonElement.deleteField (cmb.js?ver=4.6.6:106)
at HTMLDocument.dispatch (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils&ver=4.6.6:3)
field-wysiwyg.js?ver=4.6.6:7 Uncaught TypeError: Cannot read property ‘remove’ of null
at HTMLTextAreaElement.<anonymous> (field-wysiwyg.js?ver=4.6.6:7)
at Function.each (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils&ver=4.6.6:2)
at a.fn.init.each (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils&ver=4.6.6:2)
at Array.<anonymous> (field-wysiwyg.js?ver=4.6.6:4)
at HTMLDivElement.<anonymous> (cmb.js?ver=4.6.6:226)
at Function.each (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils&ver=4.6.6:2)
at a.fn.init.each (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils&ver=4.6.6:2)
at Object.deletedField (cmb.js?ver=4.6.6:219)
at HTMLButtonElement.deleteField (cmb.js?ver=4.6.6:106)
at HTMLDocument.dispatch (load-scripts.php?c=0&load[]=jquery-core,jquery-migrate,utils&ver=4.6.6:3)