diff --git a/wp-admin/admin.php b/wp-admin/admin.php
index 5006b320b9..4ead0d51d2 100644
--- a/wp-admin/admin.php
+++ b/wp-admin/admin.php
@@ -47,7 +47,9 @@ if ( get_option( 'db_upgraded' ) ) {
 	 */
 	do_action( 'after_db_upgrade' );
 
-} elseif ( (int) get_option( 'db_version' ) !== $wp_db_version && empty( $_POST ) ) {
+} elseif ( ! wp_doing_ajax() && empty( $_POST )
+	&& (int) get_option( 'db_version' ) !== $wp_db_version
+) {
 
 	if ( ! is_multisite() ) {
 		wp_redirect( admin_url( 'upgrade.php?_wp_http_referer=' . urlencode( wp_unslash( $_SERVER['REQUEST_URI'] ) ) ) );
@@ -260,7 +262,9 @@ if ( isset( $plugin_page ) ) {
 			wp_die( __( 'Invalid plugin page.' ) );
 		}
 
-		if ( ! ( file_exists( WP_PLUGIN_DIR . "/$plugin_page" ) && is_file( WP_PLUGIN_DIR . "/$plugin_page" ) ) && ! ( file_exists( WPMU_PLUGIN_DIR . "/$plugin_page" ) && is_file( WPMU_PLUGIN_DIR . "/$plugin_page" ) ) ) {
+		if ( ! ( file_exists( WP_PLUGIN_DIR . "/$plugin_page" ) && is_file( WP_PLUGIN_DIR . "/$plugin_page" ) )
+			&& ! ( file_exists( WPMU_PLUGIN_DIR . "/$plugin_page" ) && is_file( WPMU_PLUGIN_DIR . "/$plugin_page" ) )
+		) {
 			/* translators: %s: Admin page generated by a plugin. */
 			wp_die( sprintf( __( 'Cannot load %s.' ), htmlentities( $plugin_page ) ) );
 		}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index f1ed26bf47..ce7fa803ab 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-beta3-48564';
+$wp_version = '5.5-beta3-48565';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.