vCenter SSO 400 error

Hello all,

I am running vCenter 6.7 and I've been getting the following error when trying to log into my vCenter: [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

I've tried restarting the vCenter appliance and one thing I noticed is the vAPI endpoint service was not starting. Looking at the endpoint.log, I see the following error:

2019-08-13T14:58:22.278-04:00 | INFO | state-manager1 | DefaultStateManager | Invoking sts-builder

2019-08-13T14:58:22.376-04:00 | ERROR | state-manager1 | SoapBindingImpl | SOAP fault

com.sun.xml.internal.ws.fault.ServerSOAPFaultException: Client received SOAP Fault from server: Invalid credentials Please see the server log to find more detail regarding exact cause of the failure.

at com.sun.xml.internal.ws.fault.SOAP11Fault.getProtocolException(SOAP11Fault.java:178)

at com.sun.xml.internal.ws.fault.SOAPFaultBuilder.createException(SOAPFaultBuilder.java:116)

at com.sun.xml.internal.ws.client.dispatch.DispatchImpl.doInvoke(DispatchImpl.java:259)

at com.sun.xml.internal.ws.client.dispatch.DispatchImpl.invoke(DispatchImpl.java:289)

at com.vmware.vim.sso.client.impl.SoapBindingImpl.sendMessage(SoapBindingImpl.java:161)

at com.vmware.vim.sso.client.impl.SoapBindingImpl.sendMessage(SoapBindingImpl.java:114)

at com.vmware.vim.sso.client.impl.SecurityTokenServiceImpl$RequestResponseProcessor.sendRequest(SecurityTokenServiceImpl.java:927)

at com.vmware.vim.sso.client.impl.SecurityTokenServiceImpl$RequestResponseProcessor.executeRoundtrip(SecurityTokenServiceImpl.java:856)

at com.vmware.vim.sso.client.impl.SecurityTokenServiceImpl.acquireTokenByCertificate(SecurityTokenServiceImpl.java:477)

at com.vmware.vapi.endpoint.cis.StsBuilder.createToken(StsBuilder.java:179)

at com.vmware.vapi.endpoint.cis.StsBuilder.rebuild(StsBuilder.java:77)

at com.vmware.vapi.endpoint.cis.StsBuilder.buildInitial(StsBuilder.java:54)

at com.vmware.vapi.state.impl.DefaultStateManager.build(DefaultStateManager.java:354)

at com.vmware.vapi.state.impl.DefaultStateManager$1.doInitialConfig(DefaultStateManager.java:168)

at com.vmware.vapi.state.impl.DefaultStateManager$1.run(DefaultStateManager.java:151)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at java.lang.Thread.run(Thread.java:748)

2019-08-13T14:58:22.376-04:00 | ERROR | state-manager1 | StsBuilder | Failed to acquire token for the solution user.

com.vmware.vim.sso.client.exception.AuthenticationFailedException: Provided credentials are not valid.

at com.vmware.vim.sso.client.impl.SecurityTokenServiceImpl$RequestResponseProcessor.handleFaultCondition(SecurityTokenServiceImpl.java:996)

at com.vmware.vim.sso.client.impl.SecurityTokenServiceImpl$RequestResponseProcessor.sendRequest(SecurityTokenServiceImpl.java:932)