Client side validation is not working with select multiple

[stephangrass]

I tried to use select boxes that allows multiple selections as femanager fields. One for my own model and the country field from femanager. In both cases I will get the error:

exception":"TYPO3\\CMS\\Extbase\\Property\\Exception\\TypeConverterException: No converter found which can be used to convert from \"array\" to \"string\"

Without client side validation everything works as expected. Is there any solution for this issue?

[stephangrass]

No solution anywhere?

If sponsorship would help ... please report ...

[sbusemann]

@stephangrass please leave your contact data here: https://www.in2code.de/agentur/typo3-extensions/support-und-sponsoring/ if you still want to solve it