Admin page access only via IP Address

Expected Behaviour:

Access pihole admin interface at pi.hole/admin and 192.168.1.90/admin

Actual Behaviour:

Only able to access the web interface at 192.168.1.90/admin

Debug Token:

urdakwtoy0

Debugging So Far

****nslookup** pi.hole**
Server:		208.67.222.222
Address:	208.67.222.222#53
** server can't find pi.hole: NXDOMAIN
**nslookup 192.168.1.90**
** server can't find 90.1.168.192.in-addr.arpa: NXDOMAIN
**cat /etc/pihole/local.list** 
192.168.1.90 mypi
2001:56a:73d0:f100:cc71:1fe5:c1c1:e2bc mypi
192.168.1.90 pi.hole
2001:56a:73d0:f100:cc71:1fe5:c1c1:e2bc pi.hole
**ping 192.168.1.90**
PING 192.168.1.90 (192.168.1.90) 56(84) bytes of data.
64 bytes from 192.168.1.90: icmp_seq=1 ttl=64 time=0.091 ms
64 bytes from 192.168.1.90: icmp_seq=2 ttl=64 time=0.070 ms
64 bytes from 192.168.1.90: icmp_seq=3 ttl=64 time=0.061 ms
64 bytes from 192.168.1.90: icmp_seq=4 ttl=64 time=0.067 ms
64 bytes from 192.168.1.90: icmp_seq=5 ttl=64 time=0.079 ms
64 bytes from 192.168.1.90: icmp_seq=6 ttl=64 time=0.063 ms
64 bytes from 192.168.1.90: icmp_seq=7 ttl=64 time=0.065 ms
64 bytes from 192.168.1.90: icmp_seq=8 ttl=64 time=0.073 ms
64 bytes from 192.168.1.90: icmp_seq=9 ttl=64 time=0.073 ms
^C
--- 192.168.1.90 ping statistics ---
9 packets transmitted, 9 received, 0% packet loss, time 359ms
rtt min/avg/max/mdev = 0.061/0.071/0.091/0.011 ms

Please help??? Thx

This client is not using Pi-hole for DNS, it is using OpenDNS.

Only Pi-hole can resolve the name pi.hole, so this is why you cannot load the web admin GUI using the domain name.

Fix the client so it uses Pi-hole for DNS.

The host machine has IP 192.168.1.90. I've set this as the DNS for my router and all the clients have this as DNS (see attached screenshot). I am not sure where the OpenDNS IP is coming from. Thoughts? Thx.

I fixed the issue. On my router, I disabled the LAN IPv6. I can now access the admin page and things are working perfectly. Thanks for your feedback.