Error: Trying to access array offset on value of type null at /apps/dav/lib/CalDAV/BirthdayService.php#306

[AndyXheli]

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Steps to reproduce

1. No Sure

Server configuration

Operating system:
Ubuntu 20.4
Web server:
Apache 2
Database:
10.5.12
PHP version:
8.0.12
Nextcloud version: (see Nextcloud admin page)
22.2.0
Updated from an older Nextcloud/ownCloud or fresh install:
Fresh Install
Where did you install Nextcloud from:
Nextcloud website

Nextcloud log (data/nextcloud.log)

Nextcloud log

{"reqId":"IoPpj4uCj4eCF585ahy3","level":3,"time":"2021-11-09T20:25:01+00:00","remoteAddr":"","user":"--","app":"PHP","method":"","url":"--","message":"Trying to access array offset on value of type null at /var/www/nextcloud/apps/dav/lib/CalDAV/BirthdayService.php#306","userAgent":"--","version":"22.2.0.2","exception":{"Exception":"Error","Message":"Trying to access array offset on value of type null at /var/www/nextcloud/apps/dav/lib/CalDAV/BirthdayService.php#306","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/dav/lib/CalDAV/BirthdayService.php","line":306,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"file":"/var/www/nextcloud/apps/dav/lib/BackgroundJob/GenerateBirthdayCalendarBackgroundJob.php","line":69,"function":"resetForUser","class":"OCA\\DAV\\CalDAV\\BirthdayService","type":"->"},{"file":"/var/www/nextcloud/lib/private/BackgroundJob/Job.php","line":51,"function":"run","class":"OCA\\DAV\\BackgroundJob\\GenerateBirthdayCalendarBackgroundJob","type":"->"},{"file":"/var/www/nextcloud/lib/private/BackgroundJob/QueuedJob.php","line":45,"function":"execute","class":"OC\\BackgroundJob\\Job","type":"->"},{"file":"/var/www/nextcloud/cron.php","line":127,"function":"execute","class":"OC\\BackgroundJob\\QueuedJob","type":"->"}],"File":"/var/www/nextcloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"},"id":"618aebfd2848f"}

[tcitworld]

@aleadco What you posted is a different issue, see #30112 and #30265 instead. This will not be fixed by #20766

Not sure why this specific issue happens, I had it once but couldn't manage to reproduce. Anyway, it should be simple to fix.

[AndyXheli]

@tcitworld Any updates on this ? still present NC 23

[miyata-i]

@tcitworld Any updates on this ? still present NC 24.
This error occurred on my server as well.

[tcitworld]

@miyata-i Feel free to try #33341