l2tp/ipsec vpn connection in windows and linux

i have problem in creating l2tp/ipsec vpn connection in ubuntu .the administrator of vpn server gives me IP, Username, Password and PSK and i connect with these parameters really easy in windows but when i want to create a client connection in ubuntu it does not work !

syslog output :

...~ NetworkManager[14222]: initiating Main Mode IKE_SA cb56784f-19f3-4987-8b0d-d38e7cc772c7[1] to 84.47.224.182~ NetworkManager[14222]: generating ID_PROT request 0 [ SA V V V V V ]~ NetworkManager[14222]: sending packet: from 192.168.1.94 to 84.47.224.182[500] (532 bytes)~ NetworkManager[14222]: sending retransmit 1 of request message ID 0, seq 1~ NetworkManager[14222]: sending packet: from 192.168.1.94 to 84.47.224.182[500] (532 bytes)~ NetworkManager[14222]: sending retransmit 2 of request message ID 0, seq 1~ NetworkManager[14222]: sending packet: from 192.168.1.94 to 84.47.224.182[500] (532 bytes)~ NetworkManager[14222]: destroying IKE_SA in state CONNECTING without notification~ NetworkManager[14222]: establishing connection 'cb56784f-19f3-4987-8b0d-d38e7cc772c7' failed~ nm-l2tp-service[14137]: Could not establish IPsec connection....

i think it's about encryption settings , i read below link but i does not help .

https://learn.microsoft.com/en-us/troubleshoot/windows-client/windows-security/default-encryption-settings-for-l2tp-ipsec-vpn-client

Thanks for your help .

i tried different encryption algorithm but does not help .