Condition could not be parsed: cookieconsent

Since TYPO3 11 there is an error in typo3 logfile:

Tue, 22 Aug 2023 14:53:07 +0200 [ERROR] request="44b241bf86780" component="TYPO3.CMS.Frontend.Configuration.TypoScript.ConditionMatching.ConditionMatcher": Expression could not be parsed. - {"expression":"{$page.theme.cookieconsent.enable} == 1"}

But I have no idea, the condition seems to be fine.

bootstrap_package 14.0.6
TYPO3 11.5.30
PHP 8.2

Reproduce the logged expression {$page.theme.cookieconsent.enable} == 1 with TYPO3 11.5.30, bootstrap_package 14.0.6, and PHP 8.2, then trace the condition parser and package configuration that supplies it. Done means the condition is accepted without the expression-parse error, with a regression check if the repository has a relevant test.

Written by the indexing model from the issue text.