diff --git a/admin/class-gutenberg-compatibility.php b/admin/class-gutenberg-compatibility.php
index 1ce0ca1213a..b53ec432eea 100644
--- a/admin/class-gutenberg-compatibility.php
+++ b/admin/class-gutenberg-compatibility.php
@@ -15,14 +15,14 @@ class WPSEO_Gutenberg_Compatibility {
 	 *
 	 * @var string
 	 */
-	const CURRENT_RELEASE = '16.7.0';
+	const CURRENT_RELEASE = '16.7.1';
 
 	/**
 	 * The minimally supported version of Gutenberg by the plugin.
 	 *
 	 * @var string
 	 */
-	const MINIMUM_SUPPORTED = '16.7.0';
+	const MINIMUM_SUPPORTED = '16.7.1';
 
 	/**
 	 * Holds the current version.
diff --git a/admin/class-premium-upsell-admin-block.php b/admin/class-premium-upsell-admin-block.php
index 599517e34fd..572e20601c3 100644
--- a/admin/class-premium-upsell-admin-block.php
+++ b/admin/class-premium-upsell-admin-block.php
@@ -80,6 +80,8 @@ public function render() {
 			$button_text
 		);
 
+		echo '<div class="' . esc_attr( $class ) . '">';
+
 		if ( YoastSEO()->classes->get( Promotion_Manager::class )->is( 'black-friday-2023-promotion' ) ) {
 			$bf_label   = \esc_html__( 'BLACK FRIDAY', 'wordpress-seo' );
 			$sale_label = \esc_html__( '30% OFF', 'wordpress-seo' );
@@ -87,8 +89,7 @@ public function render() {
 			echo "<div class='black-friday-container'><span>$bf_label</span> <span style='margin-left: auto;'>$sale_label</span> </div>";
 		}
 
-		echo '<div class="' . esc_attr( $class ) . '">';
-		echo '<div>';
+		echo '<div class="' . esc_attr( $class . '--container' ) . '">';
 		echo '<h2 class="' . esc_attr( $class . '--header' ) . '">' .
 			sprintf(
 				/* translators: %s expands to Yoast SEO Premium */
diff --git a/admin/views/licenses.php b/admin/views/licenses.php
index a9ba9805597..e11f750746e 100644
--- a/admin/views/licenses.php
+++ b/admin/views/licenses.php
@@ -129,14 +129,19 @@
 	esc_html__( '(Opens in a new browser tab)', 'wordpress-seo' )
 );
 
-$sale_badge = '';
+$sale_badge         = '';
+$premium_sale_badge = '';
 
 if ( YoastSEO()->classes->get( Promotion_Manager::class )->is( 'black-friday-2023-promotion' ) ) {
 	/* translators: %1$s expands to opening span, %2$s expands to closing span */
 	$sale_badge_span = sprintf( esc_html__( '%1$sSALE 30%% OFF!%2$s', 'wordpress-seo' ), '<span>', '</span>' );
 
 	$sale_badge = '<div class="yoast-seo-premium-extension-sale-badge">' . $sale_badge_span . '</div>';
+
+	$premium_sale_badge = ( $has_valid_premium_subscription ) ? '' : $sale_badge;
+
 }
+
 ?>
 
 <div class="wrap yoast wpseo_table_page">
@@ -145,7 +150,7 @@
 
 	<div id="extensions">
 		<section class="yoast-seo-premium-extension">
-			<?php echo $sale_badge; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Reason: Output is already escaped ?>
+			<?php echo $premium_sale_badge; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Reason: Output is already escaped ?>
 			<h2>
 				<?php
 				printf(
diff --git a/css/src/yst_plugin_tools.css b/css/src/yst_plugin_tools.css
index c1c9335306f..01b4baa8b1e 100644
--- a/css/src/yst_plugin_tools.css
+++ b/css/src/yst_plugin_tools.css
@@ -744,24 +744,27 @@ body.toplevel_page_wpseo_dashboard .wp-badge {
 .yoast_premium_upsell {
   box-shadow: 0 1px 6px 0 rgba(0, 0, 0, 0.3);
   border: 1px solid #dcdcdc;
-  padding: 16px;
   background-color: #fff;
-  max-width: 640px;
+  max-width: 715px;
   overflow: hidden;
   margin-top: 2em;
 }
 
-.black-friday-container{
-	margin-bottom: -2em;
-	max-width: 640px;
+.yoast_premium_upsell--container {
+  padding: 16px;
+}
+
+.black-friday-container {
 	display: flex;
 	background-color: #1F2937;
 	padding: 8px 16px;
 	border-bottom: 2px solid #FCD34D;
 }
-.black-friday-container span{
+
+.black-friday-container span {
 	color:#FCD34D;
 	font-size: 1.2rem;
+	font-weight: 600;
 }
 .yoast_premium_upsell--header {
   color: #A4286A;
diff --git a/package.json b/package.json
index f0f74588905..baa13713706 100644
--- a/package.json
+++ b/package.json
@@ -83,7 +83,7 @@
     "typescript": "^4.2.4"
   },
   "yoast": {
-    "pluginVersion": "21.4-RC3"
+    "pluginVersion": "21.4-RC4"
   },
   "version": "0.0.0"
 }
diff --git a/packages/js/src/analysis/collectAnalysisData.js b/packages/js/src/analysis/collectAnalysisData.js
index a1039c6aa71..d9d38b0860c 100644
--- a/packages/js/src/analysis/collectAnalysisData.js
+++ b/packages/js/src/analysis/collectAnalysisData.js
@@ -37,7 +37,8 @@ export default function collectAnalysisData( editorData, store, customAnalysisDa
 	// Retrieve the block editor blocks from WordPress and filter on useful information.
 	let blocks = null;
 	if ( blockEditorDataModule ) {
-		blocks = blockEditorDataModule.getBlocks();
+		blocks = blockEditorDataModule.getBlocks() || [];
+		blocks = blocks.filter( block => block.isValid );
 	}
 
 	// Make a data structure for the paper data.
diff --git a/packages/js/src/decorator/gutenberg.js b/packages/js/src/decorator/gutenberg.js
index c648f142274..cc26ecec918 100644
--- a/packages/js/src/decorator/gutenberg.js
+++ b/packages/js/src/decorator/gutenberg.js
@@ -285,7 +285,7 @@ function removeAllAnnotationsFromBlock( blockClientId ) {
  * @returns {void}
  */
 export function reapplyAnnotationsForSelectedBlock() {
-	const block = select( "core/editor" ).getSelectedBlock();
+	const block = select( "core/block-editor" ).getSelectedBlock();
 	const activeMarkerId  = select( "yoast-seo/editor" ).getActiveMarker();
 
 	if ( ! block || ! activeMarkerId ) {
diff --git a/packages/yoastseo/spec/scoring/assessments/seo/SingleH1AssessmentSpec.js b/packages/yoastseo/spec/scoring/assessments/seo/SingleH1AssessmentSpec.js
index bd7bf54bb27..0b8dd856975 100644
--- a/packages/yoastseo/spec/scoring/assessments/seo/SingleH1AssessmentSpec.js
+++ b/packages/yoastseo/spec/scoring/assessments/seo/SingleH1AssessmentSpec.js
@@ -57,21 +57,21 @@ describe( "An assessment to check whether there is more than one H1 in the text"
 
 describe( "A test for marking incorrect H1s in the body", function() {
 	it( "returns markers for incorrect H1s in the body", function() {
-		const mockPaper = new Paper( "<p>a paragraph</p><h1>heading</h1>" );
+		const mockPaper = new Paper( "<p>a paragraph</p><h1>this is a <strong>heading</strong></h1>" );
 		const mockResearcher = new EnglishResearcher( mockPaper );
 		buildTree( mockPaper, mockResearcher );
 		h1Assessment.getResult( mockPaper, mockResearcher );
 
 		const expected = [
 			new Mark( {
-				original: "<h1>heading</h1>",
-				marked: "<h1><yoastmark class='yoast-text-mark'>heading</yoastmark></h1>",
+				original: "<h1>this is a heading</h1>",
+				marked: "<h1><yoastmark class='yoast-text-mark'>this is a heading</yoastmark></h1>",
 				position: {
-					startOffset: 22,
-					endOffset: 29,
 					clientId: "",
-					endOffsetBlock: 7,
+					startOffset: 22,
+					endOffset: 56,
 					startOffsetBlock: 0,
+					endOffsetBlock: 34,
 				} } ),
 		];
 
diff --git a/packages/yoastseo/src/pluggable.js b/packages/yoastseo/src/pluggable.js
index e5dd5717ad0..f953327980f 100644
--- a/packages/yoastseo/src/pluggable.js
+++ b/packages/yoastseo/src/pluggable.js
@@ -119,7 +119,7 @@ Pluggable.prototype._reloaded = function( pluginName ) {
  * @param {string}      pluginName 	    The plugin that is registering the modification.
  * @param {number}      priority	    (optional) Used to specify the order in which the callables associated with a particular filter are called.
  * 									    Lower numbers correspond with earlier execution.
- * @returns {boolean}                   Whether or not applying the hook was successfull.
+ * @returns {boolean}                   Whether or not applying the hook was successful.
  */
 Pluggable.prototype._registerModification = function( modification, callable, pluginName, priority ) {
 	if ( typeof modification !== "string" ) {
diff --git a/packages/yoastseo/src/scoring/assessments/seo/SingleH1Assessment.js b/packages/yoastseo/src/scoring/assessments/seo/SingleH1Assessment.js
index e845fc57405..e644919ef67 100644
--- a/packages/yoastseo/src/scoring/assessments/seo/SingleH1Assessment.js
+++ b/packages/yoastseo/src/scoring/assessments/seo/SingleH1Assessment.js
@@ -99,7 +99,7 @@ class SingleH1Assessment extends Assessment {
 					startOffset: h1.position.startOffset,
 					endOffset: h1.position.endOffset,
 					startOffsetBlock: 0,
-					endOffsetBlock: h1.content.length,
+					endOffsetBlock: h1.position.endOffset - h1.position.startOffset,
 					clientId: h1.position.clientId,
 				},
 			} );
diff --git a/wp-seo-main.php b/wp-seo-main.php
index 137c55e8490..1f06571a89a 100644
--- a/wp-seo-main.php
+++ b/wp-seo-main.php
@@ -15,7 +15,7 @@
  * {@internal Nobody should be able to overrule the real version number as this can cause
  *            serious issues with the options, so no if ( ! defined() ).}}
  */
-define( 'WPSEO_VERSION', '21.4-RC3' );
+define( 'WPSEO_VERSION', '21.4-RC4' );
 
 
 if ( ! defined( 'WPSEO_PATH' ) ) {
diff --git a/wp-seo.php b/wp-seo.php
index cdf0489f9ab..def76d6adf5 100644
--- a/wp-seo.php
+++ b/wp-seo.php
@@ -8,7 +8,7 @@
  *
  * @wordpress-plugin
  * Plugin Name: Yoast SEO
- * Version:     21.4-RC3
+ * Version:     21.4-RC4
  * Plugin URI:  https://yoa.st/1uj
  * Description: The first true all-in-one SEO solution for WordPress, including on-page content analysis, XML sitemaps and much more.
  * Author:      Team Yoast