Ad tracker sites? Cannot verify server identity
I've started getting messages that say "cannot verify server identity" while using safari on my iPhone 6 running iOS 10.3.3.
The site names are criteo.com, bounceexchange.com and wistia.com. I googled them and they seem to be as tracking sites. I installed Adblock Plus but I'm still getting the messages.
I have cleared history and web data multiple times with no success. How do I make this stop?