Question type "Matrixfrage": Using the checkbox "Fragentitel nicht anzeigen" leads to an error

[marcuslelle]

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

[fritzmg]

This has been fixed in dcd2966 (but hasn't been tagged in a release yet).