Add Items

Hi. Please, I am in panic: I must add other items to the menu, but I can not !!! I add, except, but does not update !!! Is there a maximum number of entries? I am using the plugin in the left sidebar… How do I unlock the number limit? I can send the link of reference? Thanks a lot. Bruno

https://ww.wp.xz.cn/plugins/jquery-vertical-accordion-menu/