Safari-error.com?

Not a legit site. Don’t call the phone number if given.

1. Quit Safari. If you cannot, Force Quit Safari.

Force Quit .

Press command + option + esc keys together at the same time. Wait.

When Force Quit window appears, select Safari if not already.

Press Force Quit button at the bottom of the window. Wait.

Safari will quit.

2. Relaunch Safari holding the shift key down.

3. Turn off wifi and turn it back on.

Turn off Wifi. Click Wifi icon in the menu bar and select “Turn Wifi off”.

Visit another website.

You won’t have internet connection.

Turn on Wifi. Click Wifi icon in the menu bar and select “Turn Wifi on”.

Select your Network.

4. Delete Cookies

Safari > Preferences > Privacy > Cookies and other website data:

Click the “Details” button.

Remove all cookies except ones from Apple, your internet service provider and banks.

Thanks! It felt suspicious but I've never experienced anything like this on my apple products before.

No. Only Apple Support offers legitimate Apple support.

Read Phony "tech support" / "ransomware" popups and web pages.