Are you trying to log in with an account that has previously worked? If not, it looks like you just dont have permission to logon.
Please mark helpful or correct if my answer resolved your issue.
How to post effectively on VMTN
https://communities.vmware.com/people/daphnissov/blog/2018/12/05/how-to-ask-for-help-on-tech-forums
Hola la solucion es facil, entra al VMWare Appliance Manager https://IP-Vcenter:5480, luego te vas a donde dice Hora y en la parte de Sincronización de hora da clic en editar y agregale un servidor ntp yo uso el de google time.google.com le das guardar y reinicias la virtual de VCENTER y te esperas 10 minutos que levante todos los servicios y proba iniciar, ya deverias de tener resuelto el problema.
