Thanks. I checked file .htaccess, there is a redirection from wp-includes/js to homepage.
After removing this redirection, the issue is remaining. What should I do?
plugins/compat3x/plugin.js?ver=4603-20170530 Failed to load resource: net::ERR_NAME_NOT_RESOLVED
(index):1957 Uncaught ReferenceError: tinymce is not defined
at (index):1957
langs/wp-langs-en.js?ver=4603-20170530 Failed to load resource: net::ERR_NAME_NOT_RESOLVED
(index):1951 Uncaught ReferenceError: tinymce is not defined
at Object.load_ext ((index):1951)
at (index):1962