TYPO3 Core

After adding

if (!isset($searchData['pointer'] )) {
$searchData['pointer'] = 0;
}
to SearchController.php line 263 it works.

I'm using the same scenario like you. Unfortunately the change hasn't made it to the core in 13.3. Could you please be so kind to describe what to change (for a dilettante like me).

$paginator = new SlicePaginator(
                $result['rows'],
                ((int)$searchData['pointer']) + 1,
                $resultData['count'],
                $searchData['numberOfResults'],
            );
            $result['pagination'] = new SimplePagination($paginator);
        }
        // Print a message telling which words in which sections we searched for
        if (str_starts_with($searchData['sections'], 'rl')) {
            $result['searchedInSectionInfo'] = (LocalizationUtility::translate('result.inSection', 'IndexedSearch') ?? '') . ' "' . $this->getPathFromPageId((int)substr($searchData['sections'], 4)) . '"';
        }

After uptdating from 13.2 to 13.3 I noticed that the search sometimes works (around 20 % ), the other 80 % end up with the described error.