Pelkin

@themaster5_07, Thanks, now everything works! Thank you.
I made a donation to you. thanks again.

@themaster5_07, Hello.

Thank you for taking the time to help me with the problem.

I now included the error log in the plugin’s settings.

Now I see the following message:

<!–wp-invites debug:
Options: array (
‘INVITE_LENGTH’ => ’12’,
‘INVITE_SPLIT’ => ‘4’,
‘CHARS’ => ‘1234567890QWERTYUIOPASDFGHJKLZXCVBNM’,
‘REMOVE_INTERVAL’ => ‘180’,
‘SEPARATOR’ => ‘-‘,
‘debug’ => ‘1’,
‘IS_WPMU’ => 0,
‘IS_BUDDYPRESS’ => 0,
‘INVITES_PREFIX’ => ‘wp_’,
)

DELETE FROM wp_invites WHERE datetime < NOW() – INTERVAL 180 DAY

checking for real invite “W2LECUVK6KE0”

SELECT 1 FROM wp_invites WHERE value= %s LIMIT 1

Got true, 1
–>

And from the WP engine:

Warning: Cannot modify header information – headers already sent by (output started at /wp-content/plugins/wp-invites/wp-invites.php:26) in /wp-includes/pluggable.php on line 1210

All installed plugins:

Contact Form 7
Cyr to Lat enhanced
Private content
Invisible reCaptcha
Simple Login Log
WP Lightbox 2
WP-invites
WP-Mail-SMTP
WP-PageNavi