Use of undefined constant NONCE_SALT
Use of undefined constant NONCE_SALT ... in Shortcode.php on line 192
Salts are secret keys in WordPress, which provide a layer of security to your site. They are defined in the
wp-config.php. If you see the error that the
NONCE_SALT is undefined, that means your
wp-config.php file does not define this salt.
NONCE_SALT should have been automatically generated for you when you set up your site. If you check WordPress's sample wp-config.php file you can see all salts starting from line 51.
define( 'NONCE_KEY','put your unique phrase here' );
Generate a new
NONCE_SALTat WordPress salt generator
wp-config.phpfile (you can use FTP or your host's file manager) and paste the generated
Paste it there in a similar placement, as you see in the sample file, before the
/* That's all, stop editing! Happy publishing. */comment.