WARP unable to connect - connectivity check failure

OS: Windows 10
WARP version: 2023.11.6.0

error details:
Status: Unable to connect
Error reason: Failed to reach host
Error description: The initial connectivity check failed because the host was unreachable.

I wonder if this was due to my own WARP configuration or it’s because the connectivity check was somehow blocked (was trying to connect from China).
Please help!

BTW, I don’t have any other VPN or proxy and WARP can pass through windows firewall.