Sync error sending request for url()

Hi I have another error suddenly on Anki desktop 2.1.38 in Windows 10
It shows error sending request for url(): error trying to connect…
(os error - 2146893048)

Maybe antivirus or firewall software on your computer, or the network you are running on. You could try a VPN or different network, or a different machine.

Thanks, I have no problem in syncing now.