Mikrotik pptp disconnected?

Question

Computer networks

I bought myself a rb951g router, installed it, updated it, configured it.
There was a problem when setting up a VPN client, namely

I reviewed all the manuals, tried different options (L2TP) - it does not connect.
Old TP-Link connects, everything works.
I read that you need to enter 12 in Service - but I don’t know what it is and where to look.
What would you advise to do?