Macbook air can not connect to server since ios update

Just for clarity's sake, iOS is the operating system that runs on iPhones. Your Mac runs macOS. I mention this only so that if you do a search, you're searching for the correct terms.

As to your issue, it's difficult to offer suggestions without more information. What version of macOS is running on your Mac? And is this happening with any web page, or just certain ones? And using what web browser? Do other Internet services such as e-mail work?

Going to an Apple Store will probably be best at this point. We'd need a lot more details before we could be of any help here.

Regards.

This is almost certainly an issue with your particular situation, not a global issue with macOS 15.1.1 or we'd be seeing dozens if not hundreds of similar reports and I've not seen any others that match your issue. That's not to say that it can't be a bug, but if it is, it's one that's only affecting a very few systems.

That said, let's see what we can do to help. What files and pictures are these and where are they appearing? Have you shared your Apple Account information with anyone else? Is your system set up to file share or connected to any cloud services? And what have you already tried as regards your WiFi issue? We'll need more details before anyone can offer suggestions. Or you can make an appointment at an Apple Store, if you have one in your area, and get them to take a look at your system.

Regards.