ESXi 7 running but web interface not loading

[devilsinkpot]

The system is up and running for a few months without issues. All hosts are working as expected but the web interface stopped working.

When I try to access via IP (also https://ip-address/ui/) it stays blank.

The network configuration seems fine.

How would I troubleshoot this scenario?

[VM_Yamato]

Can you ping to the hosts IP address?

and how is change your browser, clear cache and use other management station?

Can you access to the hosts via SSH?

[devilsinkpot]

I tried several browser (Safari, Firefox, Chromium) on two different machines (macOS) and an iPad. Same result.

Besides the Web GUI, everything seems normal:

Ping, SSH, Console … all accessible and working.

[devilsinkpot]

Do you have any advice for me, howto troubleshoot the web interface?