SSH error : no route to host

I am using a Samsung Galaxy Tab A T595 to ssh into my ubuntu server running on the same local network (connected to same wifi router) via a mobile ssh client termius and JuiceSSH. I have successfully connected to the said server before once with termius but one day the ip address of my server changed(because it was not statically assigned) and now I keep getting "ssh: no route to host" message on one particular client(rest are connecting just fine) maybe it was because of some config change after the ip address of the ubuntu server was changed by the dhcp server?? How to fix it
PS : I am a newbie to linux,networking and this forum so kindly excuse me for any mistake in the question or any of the info :)