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How to Fix Openvpn Errors on Windows 10

One of the most familiar and practical VPN protocols is OpenVPN. It is famous for its security and excellent connection speed. You can use its official client for free. But there are many users who report that OpenVPN is not working on their Windows 10 PCs. If you also have problems working with this VPN, we will help you this way and show you how to fix OpenVPN errors on Windows 10.

What Is OpenVPN?

OpenVPN is a very popular open-source VPN client and VPN protocol. If your goal is to create a secure web tunnel, you can download and install an OpenVPN client for free on all popular systems and access all resources easily. But as mentioned before, you may encounter problems in each of these steps. So we recommend that you read this article carefully. To use OpenVPN, you can buy Windows VPS servers that are presented on our website with excellent quality.

OpenVPN Errors on Windows 10 and Its Solutions

Here are some of the most common OpenVPN problems and the ways to solve them:

The Error of TLS Key Negotiation Failed to Occur In 60 Seconds (TLS Error)

Various reasons should cause this problem. The main reason is that the client program is old. To be sure of this, enter the server and examine the log file on the server side. There is a strong possibility that the client application is an old version. For example 2.2.
If you see such messages on the server side:

OpenSSL: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol'
TLS_ERROR: BIO read tls_read_plaintext error'
TLS Error: TLS object -> incoming plaintext read error'
TLS Error: TLS handshake failed'SIGUSR1[soft,tls-error] received, client-instance restarting'


If you want to solve this problem you should upgrade it to the latest version.

Another reason can be a block in a firewall or in the ISP that somehow blocks or interferes with the TLS handshake. The next thing would be to change the settings related to the TLS minimum requirement level, but the OpenVPN client uses an old version that has incorrect instructions.


The solution may be to install a new copy of the configuration profile.

The Error of Local or Remote Keys is not synchronized

There may be cases where the TLS key negotiated to be used for TLS encryption and decryption differs from the key used on the server side. Because when the client and the server talk to each other, they use a common TLS key that is used to encrypt and decrypt the traffic. There should be a short overlap where both the old and new keys are accepted but when the old key is expired and the new key must be used. As a result, for some reason one side doesn’t do this and there is no synchronization, so, you will see this error message.


In this case, use an openvpn3-based client. This client could be OpenVPN Connect Client 2, update it to the latest version. So the solution is to update your access server to the latest version so that you can put the updated connection client on it. Then download and install the latest version of OpenVPN Connect Client from the Access Server section. Finally, despite the reduced security, you can change the TLS key update on the VPN page of the admin interface to get rid of these problems.

The Error of Server Poll Timeout

If you get a server poll timing error, it means that the server is not reachable on the specified port. Here the error message is quite clear: that is, there is no response at the address or port. When you see this error, check if the port is really open and the port is correct or if the port is accessible from the Internet, etc., to make an initial connection to the server to confirm. As a result of these symptoms, you will see the message “This server cannot be reached”.

Also, another mistake is that you forget to open the three ports that are required for the OpenVPN access server. These ports are TCP 443, TCP 943, and UDP 1194.


To solve this problem, you can set a DNS name, and then configure and save it. In the next step, you need to delete the connection profile or the OpenVPN connect client program, and then download and install again and test it.

The Error of OpenVPN Doesn’t Connet

Another common issue is that Windows or Admin RDP may fail to connect to OpenVPN. As you downloaded the new version of OpenVPN, some connection and compatibility issues may encounter, or the new version may fail to create a virtual network adapter.


Opening a VPN client can solve this problem. Go through these steps:

1- Install and run OpenVPN under an administrative account.

2- Analyze the settings on your computer and your router. You have to be sure that the WAN IP address is public or that the IP address to connect must be on the same network. As you export the configuration file, you can open it as txt, and recheck the IP address and port are correct or not.

configuring public IP address

How to fix OpenVPN errors on Windows

3- If there is a NAT router in front of the VPN server, note that you have done port forwarding. Then, do the update manually to the “remote IP address” in the previously exported .ovpn file. Change the previous IP address to the network’s public IP address:

change private Ip address for OpenVPN -  fix OpenVPN errors on Windows

4- Then, choose to activate the TAP adapter:

activate TAP adapter for OpenVPN -  fix OpenVPN errors on Windows

5- You should close the firewall and security software.

The Error of Your Session Has Expired, Please Reauthenticate

As you use a server-locked or user-locked profile, the OpenVPN Access Server works with a session token-based authentication system. Then after successful authentication, you will take a session token instead. You will be identified by the session token now. The session token is set to expire after 5 minutes of inactivity when it is not connected to the server, and will also expire after 24 hours by default. Also when the token is generated on the server, it will be locked to the VPN client’s connecting IP address.


This action can be disabled and the timeout for the total session duration can be set. So, you should either employ an auto-login type profile or raise the session token duration.

The Error of User Account Suspended or User Is in Deny List

This error will occur for two reasons:

1- In the User Permissions table, the deny access box is activated with a check mark for the user.

2- The box of The user is authenticating with an external system because the User Permissions Required for VPN Access record box is checked, then the user’s permissions table does not exist or does not match the username of the external system.


When you want to solve the deny access box:

Enter the admin web UI, click on User Management, then go to User Permissions.

You should click on Deny Access and remove the check mark for the username.

Save the setting and update your running server.

If you want to solve the issue with the required user permissions record for the VPN access box:

Go to the user permissions table and add the user if it doesn’t exist.

You should be sensitive about the spelling and case match between the access server and the authentication server.

As you see the required user permissions record for the VPN access option, uncheck the box in the user permission table.

The Error of Open Tap Device “” PATH=”” FAILED TUN or Can Not Acquire Tap Handle Event

This error message will occur when the OpenVPN Connect 3.x service stops or does not start again when you sign back into the computer. The cause of this problem is an antivirus program. Mostly, this happens for ESET Antivirus.


To solve this problem, you can reconnect by restarting the service manually, note that the automatic connection may still encounter the problem. If you want to be sure, turn off ESET. As your problem is resolved, then you may want to open a support ticket with ESET.

The Error of OpenVPN Connect Is not Showing on Windows 10

As you click on the shortcut, nothing shows up. The OpenVPN Connect window is missing. As you tried to install and re-install you will still get the same error. There is no error message appearing. It’s a bit scary.


The only thing to do is to delete the file called “.ovpn-connect-lockfile“. Then, go to the C:\Users\YourUserName\AppData\Local\Temp.
Simply delete the .ovpn-connect-lockfile file and restart OpenVPN Connect. That’s it.


OpenVPN is one of the most powerful VPNs which can be used on Windows. Here, we tried to make you familiar with some of the issues and errors of using OpenVPN on Windows 10. These are some common issues with solutions. So if you encounter any of them, read this article carefully to fix OpenVPN errors on Windows and enjoy using this great VPN.

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