The connection was down in 10

The connection was down in 10 minutes after successfully connected, which happened for every time I ran MUDFISH.Here is the ERROR message from mudfish_stdout.txt:
[657.397799] [ERROR] re103: MUDEC_00062: ODR_read() for hdr error from 27.100.36.143: ODR_ECONNRESET

[657.397799] [INFO] re103: Reconnecting to the backend 27.100.36.143:443 TCP.

[664.867226] [INFO] MUDEC_00080: TOL_sendto(2) error to re103 10.244.96.1 (AU Oceania (Sydney - HostUS)) for heartbeat (-1 55)

[664.867226] [ERROR] MUDEC_00235: Too many heartbeat errors. Blocked by network firewalls?

[691.400744] [ERROR] re103: MUDEC_00314: Failed to get any OS level event for reconnecting. (27.100.36.143:443 TCP)

[724.402631] [ERROR] re103: MUDEC_00314: Failed to get any OS level event for reconnecting. (27.100.36.143:443 TCP)

[724.868658] [INFO] MUDEC_00080: TOL_sendto(2) error to re103 10.244.96.1 (AU Oceania (Sydney - HostUS)) for heartbeat (-1 55)

[757.406519] [ERROR] re103: MUDEC_00314: Failed to get any OS level event for reconnecting. (27.100.36.143:443 TCP)

By the way, I’m using FULL VPN mode.
Please take a look. Thank you.

Did you try to change a mudfish node to another? Every mudfish nodes are same or only this mudfish node has this issue?