VPN disconnection at comodo firewall version

After upgrade to comodo firewall,the VPN net service can’t run at all.I make a try to close the firewall,the VPN net service runs again.

Can fix this issue as soon as possible?

What is the configuration of firewall?
Could you please send me some more information about your computer?
What is the OS? Is there other security software installed?
And if possible, could you list the detailed steps to reproduce this problem? Thank you very much