Warning: call_user_func_array() expects parameter 1 to be a valid callback

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  smiler78929 · Member · Nov 14, 2023 at 2:30 pm

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  Hello! I got his error message above every page of my another website, https://changyuan.com.tw/:

  Warning: call_user_func_array() expects parameter 1 to be a valid callback, class ‘AutomatticJetpackExtensionsContact_FormContact_Form_Block’ not found in /home/customer/www/changyuan.com.tw/public_html/wp-includes/class-wp-hook.php on line 324

  And when I tried to log in the WordPress, the same error message appeared with an additional part as below:

  Warning: call_user_func_array() expects parameter 1 to be a valid callback, class ‘AutomatticJetpackExtensionsContact_FormContact_Form_Block’ not found in /home/customer/www/changyuan.com.tw/public_html/wp-includes/class-wp-hook.php on line 324

  Warning: Cannot modify header information – headers already sent by (output started at /home/customer/www/changyuan.com.tw/public_html/wp-includes/class-wp-hook.php:324) in /home/customer/www/changyuan.com.tw/public_html/wp-login.php on line 502

  Have tried to locate those two mentioned PHP via the File Manager in SiteGround, but just don’t know what to do next, even after searching for an answer in the community.
  Any help would be very much appreciated. MANY THANKS!

  WP.com: Yes
  Jetpack: Yes
  Correct account: Yes

  The blog I need help with is: (visible only to logged in users)