Hi There,
Thanks for writing in! You can add this under Custom > CSS in the Customizer.
.wpcf7 .screen-reader-response {
display: none !important;
}
Your css code above is correct. I assume you did place the code on the child theme’s style.css, if so the !important
declaration should solve the issue.
Also when previewing the page, please clear your browser’s cache (ctrl+f5) or any caching plugin, so the changes will take effect immediately.
Hope it helps, Cheers!