what worked for me is to clear partition table!

Just install the latest UI VIB v1.31.0 as was stated.  Problem solved.

See ESXi Embedded Host Client

http://download3.vmware.com/software/vmw-tools/esxui/esxui-signed-9277095.vib or

http://download3.vmware.com/software/vmw-tools/esxui/esxui-signed-latest.vib

Host: Manage: Packages: Install update

Paste the URL and go...

hey, I'm facing the same issue and a very simple trick to managing it if you use it on time then just refresh browser error gone if you want to permanently remove that error you need to follow these steps.

1) https://flings.vmware.com/esxi-embedded-host-client

2) https://www.putty.org/

3) https://sourceforge.net/projects/winscp/

Download these 3 things and follow this video link attached definitely your error will be resolved.

https://www.youtube.com/watch?v=Y_xA7fdQVnM

IS SO WEIRD!! you are totally right

If i do use the mouse and not the enter key, it works perfectly!!

thanks, that was really annoying.