Need help with Pro Sites translation.

I want to translate the below content:

$content .= '<div id="psts-general-error" class="psts-warning">' .
wp_kses( __( 'You signed up with the ' . esc_html( $name ) . ' payment gateway. We will attempt to cancel your ' . esc_html( $name ) . ' payments and setup new payments if you choose to continue.', 'psts' ), $allowed_html );
$content .= '</div>';

But in .PO file I can't find this So, I can't translate it. What can I do?