JCalendar-component on Netbeans 18 not working on MacOS, but working on PC

Question

In Netbeans on my Mac, the JCalendar-component on the palette shows an empty icon with a question mark.

error-png

I followed these steps to install it: Manage Pallete > Add From Jar > Select JCalendar > Select Category > Finish

Following the same steps on my Windows PC works without problems and JCalendar appears on the palette.

I am using Apache NetBeans 18. My Java version is ...

How can I troubleshoot and resolve this issue in Netbeans on my Mac.