Required field error message turns the background white and unreadable

Hi,  When a compulsory field is missed, the error message turns the field white and unreadable.

Hello,

You can add this CSS code in your Form Designer's CSS tab to remove the background while an error occurs:

.form-line-error
{
  background: transparent;
}

Here is where to put it:

Let us know if you have any further query.

Thanks.