All devices on a wireless lan neweork can onl ping themselves and the router - EMG1702-T10A

The outer is the zyxel EMG1702-T10A.

When i try to ping any devices in my wireless  lan network, i get this output :

ping 192.168.1.104     

PING 192.168.1.104 (192.168.1.104) 56(84) bytes of data.
From 192.168.1.108 icmp_seq=1 Destination Host Unreachable
From 192.168.1.108 icmp_seq=2 Destination Host Unreachable
From 192.168.1.108 icmp_seq=3 Destination Host Unreachable
From 192.168.1.108 icmp_seq=4 Destination Host Unreachable
From 192.168.1.108 icmp_seq=5 Destination Host Unreachable
From 192.168.1.108 icmp_seq=6 Destination Host Unreachable

The ping only suceed when pingin itself and the router :

itself -

ping 192.168.1.108                                                                                                                                            

PING 192.168.1.108 (192.168.1.108) 56(84) bytes of data.
64 bytes from 192.168.1.108: icmp_seq=1 ttl=64 time=0.029 ms
64 bytes from 192.168.1.108: icmp_seq=2 ttl=64 time=0.042 ms
64 bytes from 192.168.1.108: icmp_seq=3 ttl=64 time=0.065 ms
64 bytes from 192.168.1.108: icmp_seq=4 ttl=64 time=0.063 ms

the router -

ping 192.168.1.1  

PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=2.92 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=3.17 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=1.05 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=1.38 ms

Tested with 3 devices, 2 linux and 1 android, and got the same output. All of them tried to ping eachother and he result was the same.All of them connected to the router via wifi. All host were up.

Output of some troubleshooting :

i tried sudo ip route add 192.168.1.104/32 via 192.168.1.1 dev wlan0 and sudo ip route add 192.168.1.104 via 192.168.1.1 dev wlan0 but this is the output :

ping 192.168.1.104

PING 192.168.1.104 (192.168.1.104) 56(84) bytes of data.
From 192.168.1.1: icmp_seq=2 Redirect Host(New nexthop: 192.168.1.104)
From 192.168.1.1: icmp_seq=3 Redirect Host(New nexthop: 192.168.1.104)
From 192.168.1.1: icmp_seq=4 Redirect Host(New nexthop: 192.168.1.104)
From 192.168.1.1: icmp_seq=5 Redirect Host(New nexthop: 192.168.1.104)
From 192.168.1.1: icmp_seq=6 Redirect Host(New nexthop: 192.168.1.104)
From 192.168.1.1: icmp_seq=8 Redirect Host(New nexthop: 192.168.1.104)
From 192.168.1.1: icmp_seq=11 Redirect Host(New nexthop: 192.168.1.104)
From 192.168.1.1: icmp_seq=17 Redirect Host(New nexthop: 192.168.1.104)
From 192.168.1.108 icmp_seq=26 Destination Host Unreachable
From 192.168.1.108 icmp_seq=27 Destination Host Unreachable
From 192.168.1.108 icmp_seq=28 Destination Host Unreachable
From 192.168.1.108 icmp_seq=29 Destination Host Unreachable
From 192.168.1.108 icmp_seq=30 Destination Host Unreachable
From 192.168.1.108 icmp_seq=31 Destination Host Unreachable
From 192.168.1.108 icmp_seq=32 Destination Host Unreachable

I did try some other solutions, since its a common issue, but as none of them worked, i decided make another question about it.