Will not work with some public wifi

Hello Sheldon, 
Thank you for contacting AVG Community Support.
We are sorry to know that you are unable to use VPN on some public networks. We'll certainly check and help you out.
If AVG Secure VPN is unable to establish or maintain a VPN connection, try some troubleshooting steps mentioned in the following article: Troubleshooting when unable to establish or maintain a VPN connection (https://support.avg.com/SupportArticleView?l=en&urlName=troubleshoot-avg-secure-vpn-connection&q=unable+to+establish+a+connection&supportType=home)
If AVG Secure VPN is still unable to establish or maintain a connection, the problem may be caused by the network policies of the Wi-Fi or cellular network you are connected to.
Some network operators or Wi-Fi service providers does not allow VPN services as per their network policy. 
Please try to connect and check with different network operator or internet service provider. 
If you have any queries, please do let us know. 
Thank you and keep us updated.
Why does my AVG VPN not work on certain public wifi networks? For example, it works great at the local Target store but will not work at Best Buy. 
 

Hello Sheldon, 
Thank you for contacting AVG Community Support.
We are sorry to know that you are unable to use VPN on some public networks. We'll certainly check and help you out.
If AVG Secure VPN is unable to establish or maintain a VPN connection, try some troubleshooting steps mentioned in the following article: Troubleshooting when unable to establish or maintain a VPN connection (https://support.avg.com/SupportArticleView?l=en&urlName=troubleshoot-avg-secure-vpn-connection&q=unable+to+establish+a+connection&supportType=home)
If AVG Secure VPN is still unable to establish or maintain a connection, the problem may be caused by the network policies of the Wi-Fi or cellular network you are connected to.
Some network operators or Wi-Fi service providers does not allow VPN services as per their network policy. 
Please try to connect and check with different network operator or internet service provider. 
If you have any queries, please do let us know. 
Thank you and keep us updated.