diff --git a/projects/plugins/jetpack/changelog/fix-class-not-found-error b/projects/plugins/jetpack/changelog/fix-class-not-found-error
new file mode 100644
index 0000000000000..1fd5a98213c4a
--- /dev/null
+++ b/projects/plugins/jetpack/changelog/fix-class-not-found-error
@@ -0,0 +1,4 @@
+Significance: patch
+Type: other
+
+Fix Fatal Error: Class 'Jetpack_Subscriptions_Widget' not found during REST API
diff --git a/projects/plugins/jetpack/extensions/blocks/subscriptions/subscriptions.php b/projects/plugins/jetpack/extensions/blocks/subscriptions/subscriptions.php
index 6d46ab39ff9a1..3c16140fb731a 100644
--- a/projects/plugins/jetpack/extensions/blocks/subscriptions/subscriptions.php
+++ b/projects/plugins/jetpack/extensions/blocks/subscriptions/subscriptions.php
@@ -646,6 +646,10 @@ function render_block( $attributes ) {
 		Jetpack_Gutenberg::load_styles_as_required( FEATURE_NAME );
 	}
 
+	if ( ! class_exists( 'Jetpack_Subscriptions_Widget' ) ) {
+		return '';
+	}
+
 	$subscribe_email = Jetpack_Memberships::get_current_user_email();
 
 	/** This filter is documented in \Automattic\Jetpack\Forms\ContactForm\Contact_Form */