Archive Events widget dropdown not working

I already tried to solve this on developer support forums, but no answer.

I have all set up, but this widget, Archive Events, which i configure to display as a dropdown is not working.

The lists of months appear, but then when i click on one month, nothing happens.

If i choose to display the widget as a list, the months appear listed, and then yes, when i click the pages goes to the following month.

I tried the original archives widget displaying also as a dropdown, and that works.

I’m trying also to discover the respective select code on event maker archive plugin to add what i think it gonna solve the problem, but cant find it.
onchange=’document.location.href=this.options[this.selectedIndex].value;

Thanks in advance

https://ww.wp.xz.cn/plugins/events-maker/