IRRE Elements in field different_times not expandable

[biedert]

If $GLOBALS['TYPO3_CONF_VARS']['SYS']['exceptionalErrors'] is set to the value of 30466, a PHP Warning throws an Exception in events2/Classes/Tca/TimeLabel.php Line 47 if you try to open an already existing IRRE Element in the field different_times of an tx_events2_domain_model_event entry in the Backend, resulting in the IRRE Elements not expanding at all.

• events2 Version 8.1.6
• TYPO3 Version 11.5.26

An additional condition which checks if $ctrlArray['row']['weekday'] is a string solves the problem.

Error message: Core: Exception handler (WEB): Uncaught TYPO3 Exception: #1476107295: PHP Warning: Array to string conversion in [...]/public/typo3conf/ext/events2/Classes/Tca/TimeLabel.php line 47