TYPO3 Core

PHP Warning: Undefined array key "foobar" typo3_src-11.5.16/typo3/sysext/core/Classes/Resource/ProcessedFile.php line 491

$processedImage->getProperty('title')

typo3_src-11.5.16/typo3/sysext/core/Classes/Resource/ProcessedFile.php

The error happens while "return $this->properties[$key]"

    public function getProperty($key)
    {
        // The uid always (!) has to come from this file and never the original file (see getOriginalFile() to get this)
        if ($this->isUnchanged() && $key !== 'uid') {
            return $this->originalFile->getProperty($key);
        }
        return $this->properties[$key];
    }

Maybe change it into:

    public function getProperty($key)
    {

        // The uid always (!) has to come from this file and never the original file (see getOriginalFile() to get this)
        if ($this->isUnchanged() && $key !== 'uid') {
            return $this->originalFile->getProperty($key);
        }
        if (isset($this->properties[$key]){
            return $this->properties[$key];
        }
        return null;
    }