Avast Secureline VPN Virtual IP Not Available Error

Hello everyone. When I try to connect to my Avast Secureline VPN program, it says that the virtual IP is not available. Therefore, when I open the VPN, I cannot connect to the internet from a different location. In the meantime, I have deleted the program many times and tried different VPN protocols, but it still does not work. In addition, I use the Avast Secureline VPN program on two computers and I only get this error on one computer. Thank you to everyone who answers in advance.