L2TP VPN remote access can't connect

RouterOS Beginner Basics
1

Hi everyone, currently i have problem relate to vpn l2tp vpn. i have set up l2tp vpn for long time, and it work normally.
at the moment my company start to join vpn site to site with partner. after i done configure and active vpn, all my l2tp vpn remote access user can’t connect, but if i disable vpn site to site, l2tp vpn remote access can connect properly.

anything you don’t clarify, please let me know. thank before hand.

2

Make sure your IPsec secret is the same for the tunnel and the VPN client.

3

Hi, as I describe above, if i disable vpn site to site, my client can remote access. but if i enable vpn site to site, my cleint can’t.

4

My win 10 PC can connect using L2TP to my RB751, that 751 is using an EOIP tunnel to another 751, nothing drops.

Does your log show any error messages?