Transparent background on forminator calendar

Hello,

I need a help for this page. I tried in everyway to manage the background of the calendar but i probably faild.
The page is and the pw is “cenainvilla”.

Here is the problem. https://ibb.co/vm3nPzx

I have already tried with adding css(see below) on additional css both in forminator editing and settings of the website, but it didn’t work.

#ui-datepicker-div.forminator-custom-form-491984.forminator-calendar–default {
background-color: #fff!important;
}

can someone help me?

many thanks in advance

The page I need help with: [log in to see the link]