Page cache identifier is not available

[fulaizhang]

typo3 v13:
subpage was ok,
only get this problem on startpage "/":

(1/1) #1752687715 Brotkrueml\Schema\Cache\UnknownPageCacheIdentifierException

Page cache identifier is not available
in /var/www/htdocs/vendor/brotkrueml/schema/Classes/Cache/UnknownPageCacheIdentifierException.php line 18

final class UnknownPageCacheIdentifierException extends \RuntimeException
{
public static function create(): self
{
return new self(
'Page cache identifier is not available',
1752687715,
);
}

at Brotkrueml\Schema\Cache\UnknownPageCacheIdentifierException::create()
in /var/www/htdocs/vendor/brotkrueml/schema/Classes/Cache/MarkupCacheHandler.php line 83

private function getCacheIdentifier(): string
{
    $pageCacheIdentifier = $this->runtimeCache->get(Extension::RUNTIME_CACHE_PAGE_CACHE_IDENTIFIER) ?? '';
    if ($pageCacheIdentifier === false) {
        throw UnknownPageCacheIdentifierException::create();
    }

    return $pageCacheIdentifier;
}

at Brotkrueml\Schema\Cache\MarkupCacheHandler->getCacheIdentifier()
in /var/www/htdocs/vendor/brotkrueml/schema/Classes/Cache/MarkupCacheHandler.php line 38

) {}

public function getMarkup(): ?string
{
    $pageCacheIdentifier = $this->getCacheIdentifier();

[brotkrueml]

@fulaizhang Have you cleared all caches? If the error occurs also after that, can you provide a full stack trace of the error?

[fulaizhang]

Typo V13.4.26, all caches was cleared with "cache:flush". I get the error always.
startpage rendert no cache.

[brotkrueml]

@fulaizhang Please provide a full stack trace. Actually, I can't reproduce this problem.

[brotkrueml]

No activity since three months, closing issue. Feel free to open a new issue and provide a stack trace.