==== Error ====
* mwversion: 1.45.0-wmf.15
* timestamp: 2025-08-20T17:46:37.971Z
* phpversion: `8.1.33`
* reqId: `1afa26c2-c9d2-4d4f-b4ba-6b670b7587fa`
* [[ https://logstash.wikimedia.org/app/dashboards#/view/AXFV7JE83bOlOASGccsT?_g=(time:(from:'2025-08-19T17:46:37.971Z',to:'2025-08-20T19:24:29.476Z'))&_a=(query:(query_string:(query:'reqId:%221afa26c2-c9d2-4d4f-b4ba-6b670b7587fa%22'))) | Find reqId in Logstash ]]
```name=normalized_message,lines=10
[{reqId}] {exception_url} PHP Warning: Undefined array key "EventMeetingCountry"
```
| Frame | Location | Call
| -- | -- | --
| from | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/CampaignEvents/+blame/refs/heads/wmf/1.45.0-wmf.15/src/Special/AbstractEventRegistrationSpecialPage.php#708 | /srv/mediawiki/php-1.45.0-wmf.15/extensions/CampaignEvents/src/Special/AbstractEventRegistrationSpecialPage.php(708) ]] |
| #0 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/CampaignEvents/+blame/refs/heads/wmf/1.45.0-wmf.15/src/Special/AbstractEventRegistrationSpecialPage.php#708 | /srv/mediawiki/php-1.45.0-wmf.15/extensions/CampaignEvents/src/Special/AbstractEventRegistrationSpecialPage.php(708) ]] | MediaWiki\Exception\MWExceptionHandler::handleError(int, string, string, int)
| #1 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+blame/refs/heads/wmf/1.45.0-wmf.15/includes/htmlform/HTMLForm.php#825 | /srv/mediawiki/php-1.45.0-wmf.15/includes/htmlform/HTMLForm.php(825) ]] | MediaWiki\Extension\CampaignEvents\Special\AbstractEventRegistrationSpecialPage->onSubmit(array, MediaWiki\HTMLForm\OOUIHTMLForm)
| #2 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+blame/refs/heads/wmf/1.45.0-wmf.15/includes/htmlform/HTMLForm.php#706 | /srv/mediawiki/php-1.45.0-wmf.15/includes/htmlform/HTMLForm.php(706) ]] | MediaWiki\HTMLForm\HTMLForm->trySubmit()
| #3 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+blame/refs/heads/wmf/1.45.0-wmf.15/includes/htmlform/HTMLForm.php#740 | /srv/mediawiki/php-1.45.0-wmf.15/includes/htmlform/HTMLForm.php(740) ]] | MediaWiki\HTMLForm\HTMLForm->tryAuthorizedSubmit()
| #4 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+blame/refs/heads/wmf/1.45.0-wmf.15/includes/specialpage/FormSpecialPage.php#211 | /srv/mediawiki/php-1.45.0-wmf.15/includes/specialpage/FormSpecialPage.php(211) ]] | MediaWiki\HTMLForm\HTMLForm->showAlways()
| #5 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/CampaignEvents/+blame/refs/heads/wmf/1.45.0-wmf.15/src/Special/AbstractEventRegistrationSpecialPage.php#185 | /srv/mediawiki/php-1.45.0-wmf.15/extensions/CampaignEvents/src/Special/AbstractEventRegistrationSpecialPage.php(185) ]] | MediaWiki\SpecialPage\FormSpecialPage->execute(string)
| #6 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/CampaignEvents/+blame/refs/heads/wmf/1.45.0-wmf.15/src/Special/SpecialEditEventRegistration.php#132 | /srv/mediawiki/php-1.45.0-wmf.15/extensions/CampaignEvents/src/Special/SpecialEditEventRegistration.php(132) ]] | MediaWiki\Extension\CampaignEvents\Special\AbstractEventRegistrationSpecialPage->execute(string)
| #7 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+blame/refs/heads/wmf/1.45.0-wmf.15/includes/specialpage/SpecialPage.php#725 | /srv/mediawiki/php-1.45.0-wmf.15/includes/specialpage/SpecialPage.php(725) ]] | MediaWiki\Extension\CampaignEvents\Special\SpecialEditEventRegistration->execute(string)
| #8 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+blame/refs/heads/wmf/1.45.0-wmf.15/includes/specialpage/SpecialPageFactory.php#1732 | /srv/mediawiki/php-1.45.0-wmf.15/includes/specialpage/SpecialPageFactory.php(1732) ]] | MediaWiki\SpecialPage\SpecialPage->run(string)
| #9 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+blame/refs/heads/wmf/1.45.0-wmf.15/includes/actions/ActionEntryPoint.php#499 | /srv/mediawiki/php-1.45.0-wmf.15/includes/actions/ActionEntryPoint.php(499) ]] | MediaWiki\SpecialPage\SpecialPageFactory->executePath(string, MediaWiki\Context\RequestContext)
| #10 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+blame/refs/heads/wmf/1.45.0-wmf.15/includes/actions/ActionEntryPoint.php#143 | /srv/mediawiki/php-1.45.0-wmf.15/includes/actions/ActionEntryPoint.php(143) ]] | MediaWiki\Actions\ActionEntryPoint->performRequest()
| #11 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+blame/refs/heads/wmf/1.45.0-wmf.15/includes/MediaWikiEntryPoint.php#198 | /srv/mediawiki/php-1.45.0-wmf.15/includes/MediaWikiEntryPoint.php(198) ]] | MediaWiki\Actions\ActionEntryPoint->execute()
| #12 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+blame/refs/heads/wmf/1.45.0-wmf.15/index.php#58 | /srv/mediawiki/php-1.45.0-wmf.15/index.php(58) ]] | MediaWiki\MediaWikiEntryPoint->run()
| #13 | [[ https://gerrit.wikimedia.org/r/plugins/gitiles/operations/mediawiki-config/+blame/refs/heads/master/w/index.php#3 | /srv/mediawiki/w/index.php(3) ]] | require(string)
| #14 | {main} |
==== Impact ====
Harmless, logspam only.
==== Notes ====