[400] An error occurred while sending an authentication request to the vCenter Single Sign-On server

[MartinWest]

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.

[JonathanCassol]

Good evening, I have the same problem, but my problem is when accessing vmware from outside the network via public ip, is there any impact when performing this procedure?

[MartinWest]

Good morning Jonathan

I'm not entirely sure if it solves the problem from the outside.
The procedure will surely renew all certificates from the VCSA.

I think you should give it a try.
Let me know if it worked.