You can use the CSS code. Just modify as you need and add it to the custom CSS code for the review template on the first tab.

span.wprev_totrevs {
font-size: 14px !important;
color: black;
}

Okay, I'll take a look.

Those warnings should gone in 12.2.0.  If you want to try it out, just go to the Account page inside the plugin and check the "Join the Beta program" check box. Then the beta version should show up after a page refresh.

Can you give the Beta version 12.2.0 a try? Just go to the Account page inside the plugin and check the "Join the Beta program" check box. Then the beta version should show up after a page refresh.

What is the Nextdoor URL you are using?

Try switching over to the Normal slider. I've seen the Advanced slider have some issues when used inside a Flex container.

Or you could put a max-width on the advanced slider CSS.

div#wprev-slider-1 {
max-width: 1200px;
}

Try deleting those reviews and re-importing them now.