@wenoay Sorry my suggestions did not help. If you are using VPN please turn it off -- it cannot hurt.
I did find a website which listed my suggestions as well as others ( with pictures ) so perhaps they might work: https://www.digitbin.com/fix-dns-probe-finished-no-internet
@dlowfees I am experiencing a similiar issue. When I scanned the QR code on my phone, i got a failed connection error, but on the PC Opera GX I can already see the phone in My Flow Devices, except that My Flow is empty and doesn't have the items that i can see on my phones Opera Touch My Flow.