After I update wordpress to 4.9 admin customise option seems to be broken the issue is only with cobalt theme.
works fine with other themes , when I tried to debug issue in more details its seems to be due to /boldgrid-cobalt/inc/boldgrid-theme-framework/includes/kirki/assets/js/controls/code.js file
“TypeError: CodeMirror.fromTextArea is not a function” this error its shows in error console
When I compare that with previous version of theme only diff which I see is it try to load on ready method where as in previous version it was loading it in “initKirkiControl” method.
So if I replace ready with initKirkiControl it works fine
just need to know if that’s proper approach, will it be fixed in coming versions.