div.bx-system-auth-form .error-block 
{
    display: flex; 
    align-items: center; 
    justify-content: center;
}

.error-block p 
{
    width: 100%;
    text-align: center;
}

font.errortext 
{
    color: #ffffff !important;
    background: #bf2d49;
    font-size: 15px;
    padding: 5px;
    border-radius: 5px;
}