A reboot of the host solved the issue for me
You rule! Thanks, worked!!
I first usedESXXi 6.7 but could not log in.
I then used ESXi 6.7 update 2. now everything works. Dell power edge r720
Yes, reboot the host helps
i can confirm Lionel's idea.
Here it happened after upgrading to ESXi 6.7 and changing the password. The inventory software "hammered" on the server trying to check the inventory.
After removing the device in the inventory software and rescanning the server the WebAccess worked again.
If vCenter appliance is down you can't access your ESXi hosts, even with the right account?