DCO Connect error: The semaphore timeout period has expired errno=121 on Windows 11

[Tainted136]

We have a local LAN that people connect to using OpenVPN client GUI v11.23.0.0 to access the CRM. We have a Watchguard router that checks the authentication that allows the user to connect to the LAN from home. Now, 2 people with Windows 11 machines have the same setup as all other 20 users, yet they cannot connect to the LAN because of this issue:

Fri Feb 24 16:49:12 2023 Restart pause, 8 second(s)
Fri Feb 24 16:49:20 2023 TCP/UDP: Preserving recently used remote address: [AF_INET][IP ADDRESS REDACTED]
Fri Feb 24 16:49:20 2023 ovpn-dco device [OpenVPN Data Channel Offload] opened
Fri Feb 24 16:49:41 2023 dco connect error: The semaphore timeout period has expired. (errno=121)
Fri Feb 24 16:49:41 2023 Closing DCO interface
Fri Feb 24 16:49:41 2023 SIGUSR1[soft,dco-connect-error] received, process restarting
Fri Feb 24 16:49:41 2023 MANAGEMENT: >STATE:1677253781,RECONNECTING,dco-connect-error,,,,,
Fri Feb 24 16:49:41 2023 Restart pause, 16 second(s)
Fri Feb 24 16:49:57 2023 TCP/UDP: Preserving recently used remote address: [AF_INET][IP ADDRESS REDACTED]
Fri Feb 24 16:49:57 2023 ovpn-dco device [OpenVPN Data Channel Offload] opened
Fri Feb 24 16:50:18 2023 dco connect error: The semaphore timeout period has expired. (errno=121)
Fri Feb 24 16:50:18 2023 Closing DCO interface
Fri Feb 24 16:50:18 2023 SIGUSR1[soft,dco-connect-error] received, process restarting
Fri Feb 24 16:50:18 2023 MANAGEMENT: >STATE:1677253818,RECONNECTING,dco-connect-error,,,,,
Fri Feb 24 16:50:18 2023 Restart pause, 32 second(s)

I've tried the following:
1. unisntalled all irrelevant antiviruses (besides mandatory ones) like McAfee and Kapersky
2. Disabled all antiviruses and firewall - same error
3. These are new computers - they shouldn't have some sort of local disk error as some online posts suggest
4. Tried to update the network drivers - both realtek and openvpn but they are the newest
5. Also, important to note, if I use their credentials to login from a Windows 10 PC to the LAN - it works perfectly

I'm kind of out of ideas - does anyone have any sugguestions?

I would really appreciate it!

[stipa]

Does it work if you add

Code: Select all

disable-dco

to the config?

[gainerwj]

I am having the same problem and have tried disable-dco it still does not work.