1–888–588–8639 How to Fix an IPv6 No Network Access Error 2021
IPv6 (Internet Protocol version 6) is a successor to IPv4, which remains the most widely used Internet protocol.  Eventually, however, IPv6 will replace the previous variant, as the number of computer users is constantly growing, and IPv4 will run out of all available IP addresses.
IPv6 Connectivity: No internet access error is relatively common, but generally not difficult to fix. Users reported the problem after the recent Windows 10 Fall Creators Update (v1709 ). This is most likely a compatibility problem between the machine and Internet Protocol version 6 (IPv6), which does not allow the machine to establish a normal Internet connection correctly. In addition, only some Internet providers allow the use of IPv6, preventing the network equipment from using it. Finally, the router  in use could be configured to use IPv4 instead of IPv6.
The best steps to solve your IPv6 connection problems
i) The first necessary step you can take to correct network connection errors is to reboot your device. Experts say that turning off the device can fix network problems and can be solved by turning off a device and then turning it on.
ii) System updates sometimes also help you fix the unusual drop in internet connectivity. Be sure to regularly update Windows, Android, and iOS devices.
iii) If you are losing connection then you should definitely check for network device driver updates. Manufacturers of system and network devices provide driver updates for computers.
iv) Now, one of the problems I personally faced while connecting the network, you should disable any active VPN or virtual private network connection.
Most VPN programs and connections declare that they disable IPv6 connections to secure the network connection. Additionally, an active VPN connection also automatically disables IPv6 network connectivity.
v) The next possible solution to fix access to the IPv6 network is to disable the firewall on Windows and macOS devices. At some point you can configure the firewall incorrectly and it can block all IPv6 network connections.
So to run the IPv6 network connection, you must disable your firewall or you can check the firewall settings correctly.
vi) Occasionally, your ISP (Internet Service Provider) or router may start to create connection problems to an IPv6 address. So in that case, you can try to quickly restart your router and modem. The correct way to do this is to restart your modem first and wait two minutes and then restart your router.
vii) The definitive solution is that you can simply reset IPv6 settings from cmd or command prompt. To perform this task, open “cmd” and select “Run as administrator”. Now type a command “netsh winsock reset catalog” and hit Enter. Retype the command “netsh int ipv6 reset reset.log” and press the Enter button again.
Once you are done with the command section, reboot your system. You will successfully reset your IPv6 settings.