Question type "Matrixfrage": Using the checkbox "Fragentitel nicht anzeigen" leads to an error
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Bug description
When using the question type "Matrixfrage" you cannot use the checkbox "Fragentitel nicht anzeigen".
It leads to an error:
request.CRITICAL: Uncaught PHP Exception TypeError: "strlen(): Argument #1 ($string) must be of type string, int given" at /html/contao413/vendor/pdir/contao-survey/src/Resources/contao/forms/FormQuestionWidget.php line 184 {"exception":"[object] (TypeError(code: 0): strlen(): Argument #1 ($string) must be of type string, int given at /html/contao413/vendor/pdir/contao-survey/src/Resources/contao/forms/FormQuestionWidget.php:184)"} []
Other question types are working when the checkbox is ticked.
Steps to reproduce
s. above
Expected behavior
One can use "Fragentitel nicht anzeigen".
Screenshots
Environment
MacOS 13.4.1
PHP 8.2.5
Contao 4.13.30
Firefox 116.0.3