Title: Subscriber Error Codes
Last modified: April 5, 2020

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# Subscriber Error Codes

 *  Resolved [baldock1](https://wordpress.org/support/users/baldock1/)
 * (@baldock1)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/subscriber-error-codes/)
 * I’m getting the following error codes each time someone subscribes to my blog
   notifications, can someone please help. I’m very new to all this
 * Warning: idn_to_ascii() expects parameter 2 to be integer, string given in /home2/
   wadgxc0ab6wq/public_html/wp-content/plugins/subscribe2/classes/class-s2-core.
   php on line 1037
 * Warning: checkdnsrr(): Host cannot be empty in /home2/wadgxc0ab6wq/public_html/
   wp-content/plugins/subscribe2/classes/class-s2-core.php on line 1041
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home2/wadgxc0ab6wq/public_html/wp-content/plugins/subscribe2/classes/class-
   s2-core.php:1037) in /home2/wadgxc0ab6wq/public_html/wp-includes/comment.php 
   on line 560
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home2/wadgxc0ab6wq/public_html/wp-content/plugins/subscribe2/classes/class-
   s2-core.php:1037) in /home2/wadgxc0ab6wq/public_html/wp-includes/comment.php 
   on line 561
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home2/wadgxc0ab6wq/public_html/wp-content/plugins/subscribe2/classes/class-
   s2-core.php:1037) in /home2/wadgxc0ab6wq/public_html/wp-includes/comment.php 
   on line 562
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home2/wadgxc0ab6wq/public_html/wp-content/plugins/subscribe2/classes/class-
   s2-core.php:1037) in /home2/wadgxc0ab6wq/public_html/wp-includes/pluggable.php
   on line 1281
 * Warning: Cannot modify header information – headers already sent by (output started
   at /home2/wadgxc0ab6wq/public_html/wp-content/plugins/subscribe2/classes/class-
   s2-core.php:1037) in /home2/wadgxc0ab6wq/public_html/wp-includes/pluggable.php
   on line 1284

Viewing 1 replies (of 1 total)

 *  [Matt Robinson](https://wordpress.org/support/users/mattyrob/)
 * (@mattyrob)
 * [6 years, 1 month ago](https://wordpress.org/support/topic/subscriber-error-codes/#post-12633303)
 * [@baldock1](https://wordpress.org/support/users/baldock1/)
 * Have a look at this thread – same issue and solution posted there too.
 * [https://wordpress.org/support/topic/error-host-cannot-be-empty/](https://wordpress.org/support/topic/error-host-cannot-be-empty/)

Viewing 1 replies (of 1 total)

The topic ‘Subscriber Error Codes’ is closed to new replies.

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## Tags

 * [error codes](https://wordpress.org/support/topic-tag/error-codes/)

 * 1 reply
 * 2 participants
 * Last reply from: [Matt Robinson](https://wordpress.org/support/users/mattyrob/)
 * Last activity: [6 years, 1 month ago](https://wordpress.org/support/topic/subscriber-error-codes/#post-12633303)
 * Status: resolved