Please add this CSS code you see below to your website. Here you can find an article on how to add CSS code and make it future update compatible: https://tangiblewp.freshdesk.com/support/solutions/articles/101000373820-how-to-add-css-code-that-is-future-update-compatible

 

*, 
* *,
* * *,
* * * *,
* * * * *,
* * * * *,
* * * * * *,
* * * * * * *,
* * * * * * *:before,
* * * * * * *:after,
*:hover,
* *:hover,
* * *:hover,
* * * *:hover,
* * * * *:hover,
* * * * *:hover,
* * * * * *:hover,
* * * * * * *:hover,
*:active,
* *:active,
* * *:active,
* * * *:active,
* * * * *:active,
* * * * *:active,
* * * * * *:active,
* * * * * * *:active,
*:focus,
* *:focus,
* * *:focus,
* * * *:focus,
* * * * *:focus,
* * * * *:focus,
* * * * * *:focus,
* * * * * * *:focus {
border-radius:0!important;
}