PPTP issues after new update

[alsrory]

Hello;
I have problem in vpn connection after a new updates
before its work very well but after new update show me connection failed massage
and i'll tray to fixed that issues but still same problem
also i make format for laptop its still same problem

about this command : cat /var/log/daemon.log |grep VPN

i found this error

Apr 23 10:58:16 kali NetworkManager[6256]: <error> [1461434296.146572] [vpn-manager/nm-vpn-connection.c:1977] get_secrets_cb(): Failed to request VPN secrets #3: (4) No agents were available for this request.
Apr 23 10:58:16 kali NetworkManager[6256]: <error> [1461434296.949736] [vpn-manager/nm-vpn-connection.c:1977] get_secrets_cb(): Failed to request VPN secrets #3: (4) No agents were available for this request.
Apr 23 10:58:17 kali NetworkManager[6256]: <error> [1461434297.678273] [vpn-manager/nm-vpn-connection.c:1977] get_secrets_cb(): Failed to request VPN secrets #3: (4) No agents were available for this request.
Apr 23 10:58:18 kali NetworkManager[6256]: <error> [1461434298.319708] [vpn-manager/nm-vpn-connection.c:1977] get_secrets_cb(): Failed to request VPN secrets #3: (4) No agents were available for this request.
Apr 23 10:58:18 kali NetworkManager[6256]: <error> [1461434298.917101] [vpn-manager/nm-vpn-connection.c:1977] get_secrets_cb(): Failed to request VPN secrets #3: (4) No agents were available for this request.
Apr 23 10:58:19 kali NetworkManager[6256]: <error> [1461434299.416743] [vpn-manager/nm-vpn-connection.c:1977] get_secrets_cb(): Failed to request VPN secrets #3: (4) No agents were available for this request.
Apr 23 11:01:20 kali NetworkManager[6256]: <info>  VPN service 'pptp' disappeared

any body he can help me to solved my problem .
thanks