Title: error in debug.log
Last modified: September 9, 2025

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# error in debug.log

 *  Resolved [stefansic](https://wordpress.org/support/users/stefansic/)
 * (@stefansic)
 * [9 months ago](https://wordpress.org/support/topic/error-in-debug-log-33/)
 * Hi, my debug.log is full of this:
 * [09-Sep-2025 06:53:08 UTC] PHP Deprecated: MailPoetVendor\Sabberworm\CSS\Parser::
   __construct(): Implicitly marking parameter $oParserSettings as nullable is deprecated,
   the explicit nullable type must be used instead in /usr/www/users/xxxxx/xxxxx/
   wp-content/plugins/mailpoet/vendor-prefixed/sabberworm/php-css-parser/src/Parser.
   php on line 10
   [09-Sep-2025 06:53:08 UTC] PHP Deprecated: MailPoetVendor\Sabberworm\
   CSS\CSSList\Document::render(): Implicitly marking parameter $oOutputFormat as
   nullable is deprecated, the explicit nullable type must be used instead in /usr/
   www/users/xxxxx/xxxxx/wp-content/plugins/mailpoet/vendor-prefixed/sabberworm/
   php-css-parser/src/CSSList/Document.php on line 70[09-Sep-2025 06:53:08 UTC] 
   PHP Deprecated: MailPoetVendor\Sabberworm\CSS\RuleSet\RuleSet::addRule(): Implicitly
   marking parameter $oSibling as nullable is deprecated, the explicit nullable 
   type must be used instead

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Support [Saravanan S, a11n](https://wordpress.org/support/users/simplysaru/)
 * (@simplysaru)
 * [8 months, 4 weeks ago](https://wordpress.org/support/topic/error-in-debug-log-33/#post-18637343)
 * Hi [@stefansic](https://wordpress.org/support/users/stefansic/) ,
 * Sorry to hear about the issues with the debug logs.
 * Can you please share with us the following information to debug this error further:
    - A screenshot of the MailPoet > Help > System Status page. Please ensure to
      capture the whole page or make several screenshots.
    - Copy and paste the information from MailPoet > Help > System Info.
 *  Plugin Support [Kel C. a11n](https://wordpress.org/support/users/kellymetal/)
 * (@kellymetal)
 * [3 months, 3 weeks ago](https://wordpress.org/support/topic/error-in-debug-log-33/#post-18820836)
 * Hi there [@stefansic](https://wordpress.org/support/users/stefansic/),
 * We haven’t heard back from you in a while, so I’m going to mark this as resolved.
   If you have any other questions, please feel free to open a new thread. Take 
   care, and have a wonderful day.

Viewing 2 replies - 1 through 2 (of 2 total)

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 * 2 replies
 * 3 participants
 * Last reply from: [Kel C. a11n](https://wordpress.org/support/users/kellymetal/)
 * Last activity: [3 months, 3 weeks ago](https://wordpress.org/support/topic/error-in-debug-log-33/#post-18820836)
 * Status: resolved