Add upstream

wp-content/plugins/jetpack/modules/widgets/simple-payments/admin-warning.php

@@ -0,0 +1,16 @@
+<div class='jetpack-simple-payments-disabled-error'>
+	<p>
+		<?php
+			$support_url = ( defined( 'IS_WPCOM' ) && IS_WPCOM )
+				? 'https://support.wordpress.com/simple-payments/'
+				: 'https://jetpack.com/support/simple-payment-button/';
+			printf(
+				wp_kses(
+					__( 'Your plan doesn\'t include Simple Payments. <a href="%s" rel="noopener noreferrer" target="_blank">Learn more and upgrade</a>.', 'jetpack' ),
+					array( 'a' => array( 'href' => array(), 'rel' => array(), 'target' => array() ) )
+				),
+				esc_url( $support_url )
+			);
+		?>
+	</p>
+</div>