VPN Access won't save in Quick Set

RouterOS Beginner Basics
1

This gif explains my problem:

I am trying to set up SSTP VPN, and it worked on my other MikroTik perfectly. I don’t have a static IP, so the dns name is extremely helpful.

The routerboard model is RB750Gr3

2

Which version of the firmware are you using.

Using the quickset is problematic and I have written earlier about.

I am missing ipsec with l2pt for weeks now and saw today in the 6.38RC40 a return of a working 3des/md5 support and I hope that will solve my drought period of secure connection from my phone.
I have no high hopes on that on my RB750Gr3 and I have the impression that Miktotik is getting to get grip on this bit of new hardware.

3

I wanted to use DNS address to avoid having to set up a static IP. Do I have to use something like DynDNS then?

Software version was updated to the newest one, 6.37.3.