diff --git a/Controller.php b/Controller.php
index 99f83c3d8..13982ba80 100644
--- a/Controller.php
+++ b/Controller.php
@@ -15,17 +15,9 @@
 use Piwik\Date;
 use Piwik\Nonce;
 use Piwik\Notification;
-use Piwik\Option;
 use Piwik\Piwik;
 use Piwik\Plugins\GoogleAnalyticsImporter\Commands\ImportReports;
 use Piwik\Plugins\GoogleAnalyticsImporter\Google\Authorization;
-use Piwik\Plugins\SearchEngineKeywordsPerformance\Exceptions\MissingClientConfigException;
-use Piwik\Plugins\SearchEngineKeywordsPerformance\Exceptions\MissingOAuthConfigException;
-use Piwik\Plugins\SearchEngineKeywordsPerformance\Provider\Google as ProviderGoogle;
-use Piwik\Plugins\SearchEngineKeywordsPerformance\Provider\Bing as ProviderBing;
-use Piwik\Plugins\SearchEngineKeywordsPerformance\Provider\ProviderAbstract;
-use Piwik\Plugins\WebsiteMeasurable\Type as WebsiteMeasurableType;
-use Piwik\Site;
 use Piwik\Url;
 use Psr\Log\LoggerInterface;
 
@@ -51,7 +43,13 @@ public function index($errorMessage = false)
 
         $hasClientConfiguration = $authorization->hasClientConfiguration();
         if ($hasClientConfiguration) {
-            $googleClient = $authorization->getConfiguredClient();
+            try {
+                $googleClient = $authorization->getConfiguredClient();
+            } catch (\Exception $ex) {
+                $authorization->deleteClientConfiguration();
+
+                throw $ex;
+            }
 
             $authUrl = $googleClient->createAuthUrl();
 
diff --git a/lang/en.json b/lang/en.json
index 9e69621eb..3016d0b57 100644
--- a/lang/en.json
+++ b/lang/en.json
@@ -3,7 +3,7 @@
     "AdminMenuTitle": "Google Analytics Import",
     "ConfigureTheImporter": "Configure the Importer",
     "InvalidClientJson": "Invalid JSON in credentials file, try re-downloading the file from the Google API Console.",
-    "MissingClientConfiguration": "Missing client configuration.",
+    "MissingClientConfiguration": "Missing or invalid client configuration, please reupload.",
     "SettingUp": "Setting Up",
     "ImporterHelp1": "The Google Analytics Importer requires you to set up OAuth Client configuration in the Google API Console before you can do anything else.",
     "ImporterHelp2": "To see a step-by-step guide for doing this and setting up this plugin %1$sclick here.%2$s",