Problem of connecting the iPhone to the MacBook through the USB cable

As soon as I start connecting my iPhone 8 Plus to my MacBook Air (2015), a notification appears on the screen of the iPhone with the question "trust / not trust this computer." I don’t have time to choose “trust” because this notification appears for a second, then disappears, then reappears for a second and so on.

I have already connected my devices this way many times, this problem has appeared for the first time.

I have cleaned system folder "Lockdown", both devices have the latest system update.

I'd be grateful for your advices about a way of fixing this problem!