Can't access HA via local IP address

I have been using HA on my RPi4 with SSD for years. Accessing it via its local IP address and remotely via my Nabu Casa account.

However, I noticed a couple of days ago that I can no longer access the HA via its local address, 192.168.0.6, but I can access it via the Nabu Casa remote link. I can still PING the HA locally without issue.

To clarify, when I enter the HA local IP address, I see the HA logo and the Open Home Foundation box but also a spinning wheel. To me that means that I am accessing the HA but something on the HA is stopping a local connection.

I will also add that this is the only device that I cannot connect to. All my other devices, NAS, Raspberry Pi etc all connect fine.

I have tried different browsers and it is the same whether I use my iPad, iPhone or MAC.

I have not made any network/firewall changes that and I am at a loss as to how to fault find this issue.

Any help will be appreciated. Thanks.

Does HA have static IP or dhcp (router assigns it)? Did you double-check HA’s internal IP? Connect monitor to PI’s output and see if IP has been changed. If you experienced power loss - general, in your house, so that your router rebooted then local IP could be different if you don’t have either static IP on HA or dhcp reservation in router.