diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1b930a6e..e5039219 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
+## 1.0.8 - 2018.04.19
+### Changed
+* Fixed an issue where an empty **Exclude Patterns** table and the use of Project Config on Craft 3.1 or later could cause an exception to be thrown when a 404 is thrown
+* Fixed an issue where Webperf would fire during Live Preview when it shouldn't
+* Updated Twig namespacing to be compliant with deprecated class aliases in 2.7.x
+
 ## 1.0.7 - 2019-03-15
 ### Changed
 * Fixed a potential `Undefined property` in the MetricsController 
diff --git a/composer.json b/composer.json
index 0b60ff70..0cad6cee 100644
--- a/composer.json
+++ b/composer.json
@@ -2,7 +2,7 @@
     "name": "nystudio107/craft-webperf",
     "description": "Webperf helps you build & maintain high quality websites through Real User Measurement of your website's performance",
     "type": "craft-plugin",
-    "version": "1.0.7",
+    "version": "1.0.8",
     "keywords": [
         "craft",
         "cms",
diff --git a/src/Webperf.php b/src/Webperf.php
index 1cd2f905..354ac0bb 100644
--- a/src/Webperf.php
+++ b/src/Webperf.php
@@ -237,7 +237,7 @@ public function clearAllCaches()
     protected function addComponents()
     {
         $request = Craft::$app->getRequest();
-        if ($request->getIsSiteRequest() && !$request->getIsConsoleRequest()) {
+        if ($request->getIsSiteRequest() && !$request->getIsConsoleRequest() && !$request->getIsLivePreview()) {
             $this->setRequestUrl();
             try {
                 $uri = $request->getPathInfo();
@@ -365,7 +365,7 @@ function () {
                 // Install these only after all other plugins have loaded
                 $request = Craft::$app->getRequest();
                 // Only respond to non-console site requests
-                if ($request->getIsSiteRequest() && !$request->getIsConsoleRequest()) {
+                if ($request->getIsSiteRequest() && !$request->getIsConsoleRequest()  && !$request->getIsLivePreview()) {
                     $this->handleSiteRequest();
                 }
                 // Respond to Control Panel requests
@@ -598,10 +598,12 @@ protected function renderSidebar(Element $element): string
     protected function excludeUri($uri): bool
     {
         $uri = '/'.ltrim($uri, '/');
-        foreach (self::$settings->excludePatterns as $excludePattern) {
-            $pattern = '`'.$excludePattern['pattern'].'`i';
-            if (preg_match($pattern, $uri) === 1) {
-                return true;
+        if (!empty(self::$settings->excludePatterns)) {
+            foreach (self::$settings->excludePatterns as $excludePattern) {
+                $pattern = '`'.$excludePattern['pattern'].'`i';
+                if (preg_match($pattern, $uri) === 1) {
+                    return true;
+                }
             }
         }
 
diff --git a/src/models/Settings.php b/src/models/Settings.php
index 8bf5a205..cb3a9fae 100644
--- a/src/models/Settings.php
+++ b/src/models/Settings.php
@@ -10,10 +10,16 @@
 
 namespace nystudio107\webperf\models;
 
+use nystudio107\webperf\Webperf;
+
 use Craft;
 use craft\base\Model;
+use craft\behaviors\EnvAttributeParserBehavior;
+use craft\validators\ArrayValidator;
 use craft\validators\ColorValidator;
 
+use yii\behaviors\AttributeTypecastBehavior;
+
 use putyourlightson\blitz\Blitz;
 
 /**
@@ -221,6 +227,7 @@ public function rules()
             ['rateLimitMs', 'integer'],
             ['rateLimitMs', 'default', 'value' => 500],
             ['webpageTestApiKey', 'string'],
+            ['excludePatterns', ArrayValidator::class],
             ['includeCraftWarnings', 'boolean'],
             ['errorSamplesStoredLimit', 'integer'],
             ['errorSamplesStoredLimit', 'default', 'value' => 1000],
@@ -258,4 +265,29 @@ public function rules()
             ]
         ];
     }
+
+    /**
+     * @return array
+     */
+    public function behaviors()
+    {
+        $craft31Behaviors = [];
+        if (Webperf::$craft31) {
+            $craft31Behaviors = [
+                'parser' => [
+                    'class' => EnvAttributeParserBehavior::class,
+                    'attributes' => [
+                        'webpageTestApiKey',
+                    ],
+                ]
+            ];
+        }
+
+        return array_merge($craft31Behaviors, [
+            'typecast' => [
+                'class' => AttributeTypecastBehavior::class,
+                // 'attributeTypes' will be composed automatically according to `rules()`
+            ],
+        ]);
+    }
 }
diff --git a/src/variables/ManifestVariable.php b/src/variables/ManifestVariable.php
index 20a5dca2..fb444fbb 100644
--- a/src/variables/ManifestVariable.php
+++ b/src/variables/ManifestVariable.php
@@ -60,10 +60,10 @@ public function __construct()
      * @param bool       $async
      * @param null|array $config
      *
-     * @return \Twig_Markup
+     * @return \Twig\Markup
      * @throws \yii\web\NotFoundHttpException
      */
-    public function includeCssModule(string $moduleName, bool $async = false, $config = null): \Twig_Markup
+    public function includeCssModule(string $moduleName, bool $async = false, $config = null): \Twig\Markup
     {
         return Template::raw(
             ManifestHelper::getCssModuleTags(self::$config, $moduleName, $async)
@@ -75,9 +75,9 @@ public function includeCssModule(string $moduleName, bool $async = false, $confi
      *
      * @param string $path
      *
-     * @return \Twig_Markup
+     * @return \Twig\Markup
      */
-    public function includeInlineCssTags(string $path): \Twig_Markup
+    public function includeInlineCssTags(string $path): \Twig\Markup
     {
         return Template::raw(
             ManifestHelper::getCssInlineTags($path)
@@ -88,9 +88,9 @@ public function includeInlineCssTags(string $path): \Twig_Markup
      * Returns the uglified loadCSS rel=preload Polyfill as per:
      * https://github.com/filamentgroup/loadCSS#how-to-use-loadcss-recommended-example
      *
-     * @return \Twig_Markup
+     * @return \Twig\Markup
      */
-    public static function includeCssRelPreloadPolyfill(): \Twig_Markup
+    public static function includeCssRelPreloadPolyfill(): \Twig\Markup
     {
         return Template::raw(
             ManifestHelper::getCssRelPreloadPolyfill()
@@ -102,7 +102,7 @@ public static function includeCssRelPreloadPolyfill(): \Twig_Markup
      * @param bool       $async
      * @param null|array $config
      *
-     * @return null|\Twig_Markup
+     * @return null|\Twig\Markup
      * @throws \yii\web\NotFoundHttpException
      */
     public function includeJsModule(string $moduleName, bool $async = false, $config = null)
@@ -119,7 +119,7 @@ public function includeJsModule(string $moduleName, bool $async = false, $config
      * @param string $type
      * @param null   $config
      *
-     * @return null|\Twig_Markup
+     * @return null|\Twig\Markup
      * @throws \yii\web\NotFoundHttpException
      */
     public function getModuleUri(string $moduleName, string $type = 'modern', $config = null)
@@ -132,9 +132,9 @@ public function getModuleUri(string $moduleName, string $type = 'modern', $confi
     /**
      * Include the Safari 10.1 nomodule fix JavaScript
      *
-     * @return \Twig_Markup
+     * @return \Twig\Markup
      */
-    public function includeSafariNomoduleFix(): \Twig_Markup
+    public function includeSafariNomoduleFix(): \Twig\Markup
     {
         return Template::raw(
             ManifestHelper::getSafariNomoduleFix()
@@ -146,9 +146,9 @@ public function includeSafariNomoduleFix(): \Twig_Markup
      *
      * @param string $path
      *
-     * @return \Twig_Markup
+     * @return \Twig\Markup
      */
-    public function includeFile(string $path): \Twig_Markup
+    public function includeFile(string $path): \Twig\Markup
     {
         return Template::raw(
             ManifestHelper::getFile($path)
@@ -162,9 +162,9 @@ public function includeFile(string $path): \Twig_Markup
      * @param string $type
      * @param null   $config
      *
-     * @return \Twig_Markup
+     * @return \Twig\Markup
      */
-    public function includeFileFromManifest(string $fileName, string $type = 'legacy', $config = null): \Twig_Markup
+    public function includeFileFromManifest(string $fileName, string $type = 'legacy', $config = null): \Twig\Markup
     {
         return Template::raw(
             ManifestHelper::getFileFromManifest($config, $fileName, $type)