also i found a error notice
codemirror.js?ver=5.5.0:5321 Uncaught TypeError: Cannot read property ‘attach’ of undefined
at Object.keyMap (codemirror.js?ver=5.5.0:5321)
at new CodeMirror (codemirror.js?ver=5.5.0:115)
at CodeMirror (codemirror.js?ver=5.5.0:60)
at Function.CodeMirror.fromTextArea (codemirror.js?ver=5.5.0:5863)
at post-new.php:1069
the 1069 of post-new.php was
var editor = CodeMirror.fromTextArea(
