Try making the esp ip 192.168.0.1 or 192.168.1.1, leave subnet alone..
kind of remember your isp is also using a 255.255.252.0 subnet..
If yes, then that network is from 192.168.4.1-192.168.7.254 and you shouldn’t use anything in this range for a new second network..
assuming you want to also be connected to isp..
you’re confusing your system..
a subnet mask of 255.255.255.0 will give you a range of 192.168.0.1-192.168.0.254..
so try either 0.1 or 1.1, it should work..
good luck.. ~q