Please add a little more info.
> Operating System (OS/VERSION):
Type here, e.g. CentOS 6
> VestaCP Version:
Type here, e.g. 0.9.8-17
> Installed Software (what you got with the installer):
Type here, e.g. php-fpm, apache, nginx, mysql
> Steps to Reproduce:
Type here, e.g. install vesta and type cat /etc/issue
> Related Issues/Forum Threads:
Found anything that might be related to this? It might help us find the cause.
> Other Notes:
Anything else? May be logs?