No, from this thread I realized that i install my site multisited, and I have resolved my problem by accessing the network admin dashboard. thanks.
I’m multisited, network dashboard solved all. Thanks!
i have a same issue, link
but after i open the wp-config, I didn’t find the statement,
/** Hardening WordPress **/
define(‘DISALLOW_FILE_EDIT’, true);
any other suggestion?? thanks