Cannot access a website

Did you try clearing history and website data? Tap Settings - Safari - Clear history and website data. Retry accessing the site.

So you have no problem accessing the website with iPad Air (I assume it is running iOS 11 or 12) but iOS 10 devices can't access the website. This sounds like digital certificate trust issue. Perhaps iOS 10 does not have the root certificate in its certificate store.

Try another third party Web browser, instead.

Here are a few, more popular, third party web browsers that I know are STILL being updated and supported on iOS 10 and earlier.

Firefox Web browser

Google Chrome browser

iCab Mobile Web browser

Dolphin Web browser

Dolphin Incognito Web browser

DuckDuckGo private Web browxer

Snow Bunny Web browser

Private Browsing Web browser

Aloha Web browser

Maxthon Web browser

Good Luck to You!

What iOS version is the IPhone 5C and iPad 4 running? This sounds like digital certificate issue. Do you get an error message at all (something like MichelPM got on the first attempt)?

I am using a 1st gen iPad Pro using a different 3rd party Web browser and your Web address doesn't work for me, either.

I get a “SSL (Secure Socket Layer ) error 1200. A secure socket connection cannot be made.”

I suspect the webserver ran into a problem during SSL/TLS handshake. It is supposed to send an intermediate SSL certificate (issued by Sectigo) to the client (Safari browser) to complete the certificate chain. It failed to do that and ergo.. the error message you saw (or a blank screen when it timed out).

Does "can not access" mean the website does not exist when you visit it? You just wait and wait until it times out and the browser stops trying, is that correct? Do you all (you both and your daughter) access the internet the same way (thru the same WiFi access point)? Can you tell us the web address?

I got it to finally got it to load.

Something happened the first time I copy and pasted the address into my browser.

You probably copied the dot (.) at the end of the address.

My iPad Pro is running iOS 10.3.3.

Like I said, the first few times I put the link in ( no, I didn't copy the period at the end of the link ) it didn't load and I got the Secure Socket Layer error message.

I then quit and re-launched my third party Web browser and that time, the link loaded.

The link has a menu at the top of the Website, then follows an image of a male lawyer with address and contact info next to the image and other info as you scroll down.

Then a bunch of info about this lawyer in front of an ocean shore background.

Then the very bottom of the Website has a contact info form to fill in.

The Website has a lot of different web design features and effects going on.

It did finally load into my Web browser on my iPad Pro running iOS 10.3.3.

She probably uses a third party web browser. Were you able to load the site with iOS 10 Safari?

I got it to finally got it to load.

Something happened the first time I copy and pasted the address into my browser.

Just curious, what did you end up doing to get this to finally load?