diff --git a/src/Settings.php b/src/Settings.php
index ce0336c5..8e9de4d3 100644
--- a/src/Settings.php
+++ b/src/Settings.php
@@ -59,28 +59,6 @@ public static function init() {
                 Plugin::VERSION
             );
             
-            \wp_register_script( 
-                'AceEditor', 
-                \plugin_dir_url(__FILE__)."../public/js/ace-builds/src-min-noconflict/ace.js",
-                array('jquery'),
-                Plugin::VERSION
-            );
-            
-            \wp_localize_script(
-                'AceEditor', 
-                'AceEditorLocalized', 
-                array(
-                    'plugin_url' => \plugin_dir_url(__FILE__) . "../",
-                )
-            );
-            
-            \wp_enqueue_script(
-                "AceEditor",
-                \plugin_dir_url(__FILE__)."../public/js/ace-builds/src-min-noconflict/ace.js", 
-                array("jquery"),
-                Plugin::VERSION
-            );  
-            
             \wp_register_style(
                 'RollbarWordpressSettings',
                 \plugin_dir_url(__FILE__)."../public/css/RollbarWordpressSettings.css",
@@ -89,20 +67,11 @@ public static function init() {
             );
             \wp_enqueue_style('RollbarWordpressSettings');
         });
-        
-        \add_action('init', array(get_called_class(), 'registerSession'));
 
         \add_action('admin_post_rollbar_wp_restore_defaults', array(get_called_class(), 'restoreDefaultsAction'));
         
         \add_action('pre_update_option_rollbar_wp', array(get_called_class(), 'preUpdate'));
     }
-    
-    public static function registerSession()
-    {
-        if( ! session_id() && ! defined( 'DOING_CRON' ) ) {
-            session_start();
-        }
-    }
 
     function addAdminMenu()
     {
@@ -372,6 +341,13 @@ public static function flashRedirect($type, $message)
     
     public static function flashMessage($type, $message)
     {
+        // This is only designed to run in the admin for the main HTML request.
+        // If there is no session at this point something has gone terribly
+        // wrong, and we should bail out.
+        if( ! is_admin() || ! session_id() || wp_doing_cron() ) {
+            return;
+        }
+
         $_SESSION['rollbar_wp_flash_message'] = array(
             "type" => $type,
             "message" => $message
@@ -397,14 +373,18 @@ public static function preUpdate($settings)
             try {
                 Plugin::instance()->enableMustUsePlugin();
             } catch (\Exception $exception) {
-                self::flashMessage('error', 'Failed enabling the Must-Use plugin.');
+                add_action('admin_notices', function () {
+                    echo '<div class="error notice"><p><strong>Error:</strong> failed to enable the Rollbar Must-Use plugin.</p></div>';
+                });
                 $settings['enable_must_use_plugin'] = false;
             }
         } else {
             try {
                 Plugin::instance()->disableMustUsePlugin();
             } catch (\Exception $exception) {
-                self::flashMessage('error', 'Failed disabling the Must-Use plugin.');
+                add_action('admin_notices', function () {
+                    echo '<div class="error notice"><p><strong>Error:</strong> failed to disable the Rollbar Must-Use plugin.</p></div>';
+                });
                 $settings['enable_must_use_plugin'] = true;
             }
         }