Hello all
We had the following problem with our VCSA Webclient:
[400] An error occurred while sending an authentication request to the vCenter Single Sign-On server - An error occurred when processing the metadata during vCenter Single Sign-On setup - null. Back to login screen
Our solution was:
Connect to VCSA with Putty and login as root
shell
/usr/lib/vmware-vmca/bin/certificate-manager
We choose 8 to "Reset all Certificates"
Answer the questions
After that we could log in again as usual.
I hope this solution helps you too.