Is there a limit on the free version?

Hi,

I have a list of items introduced in the wordpress menu and they are linked with accordion menu plugin in order to see them in a widget.

I am trying to increase the number of items but when I save the wordpress menu, the lastest ones I’ve introduced simply disappear.

Is there a limit on the free version?

Thanks!

https://www.ads-software.com/plugins/nextend-accordion-menu/