Auto Failover RouterOS7

Hi, any help would be appreciated, I have a MikroTik Chateau router which I want to configure to do Autofailover.
the Chateau is an LTE router and I have it setup and working fine on LTE.
I have a second internet connection on a static IP to go into Ether5 and this is where my problems have started, I found some online articles on how to setup autofailover but none of them are routerOS7 and none of them are on an LTE router which I think is some of the problem??

Hi,

Did you ever manage to fix this? I am on the same boat currently.