Today I am experiencing issues with vcsa vSphere we client login with my domain account i got this error A server error Occurred 400. To fix the issue we need to check the Appliance Time Zone. for my case i found there is a time difference between these two appliances one is (PSC)Platform Service Controller and vCenter. log into the PSC & vCenter below URL. So verify your ESXi host are having the correct time. and Make sure you have vCSA time-sync configured via NTP & correct the Time zone. https://clvcPSC.cloudvmkb.com:5480, https://VCENTER.cloudvmkb.com:5480.
Then restart both Appliance services. Log in as root through an SSH.
To enable the shell : Shell.set –enabled True
To Launch the Shell: shell
To Stop all services: service-control –stop –all
To start All services: service-control –start –all
Run this command to start a specific service: service-control –start servicename Thank You.
Hope this will be informative for you, Thank you for Reading !