diff --git a/src/js/index.js b/src/js/index.js
index 8e43603fe..ac4242566 100644
--- a/src/js/index.js
+++ b/src/js/index.js
@@ -347,10 +347,8 @@ app.filter('installationStateLabel', function () {
 });
 
 app.filter('taskName', function () {
-    return function(app) {
-        if (!app) return '';
-
-        switch (app.installationState) {
+    return function(installationState) {
+        switch (installationState) {
         case ISTATES.PENDING_INSTALL: return 'install';
         case ISTATES.PENDING_CLONE: return 'clone';
         case ISTATES.PENDING_LOCATION_CHANGE: return 'location change';
@@ -365,7 +363,7 @@ app.filter('taskName', function () {
         case ISTATES.PENDING_BACKUP: return 'backup';
         case ISTATES.PENDING_START: return 'start app';
         case ISTATES.PENDING_STOP: return 'stop app';
-        default: return app.installationState;
+        default: return installationState || '';
         }
     };
 });
diff --git a/src/views/app.html b/src/views/app.html
index da4e4b0d8..73e2201c5 100644
--- a/src/views/app.html
+++ b/src/views/app.html
@@ -115,7 +115,7 @@
           <p>Cloudron will re-install the app in-place with existing configuration. Existing data will be retained.</p>
         </div>
         <div ng-if="app.error">
-          <p>The <b>{{ app.error.task | taskName }}</b> operation failed with the following error:</p>
+          <p>The <b>{{ app.error.installationState | taskName }}</b> operation failed with the following error:</p>
           <p class="text-danger">{{ app.error.reason + ': ' + app.error.message }}</p>
         </div>
         <div class="form-group" ng-show="repair.location && repair.domain">
@@ -795,7 +795,7 @@
             <p>If the app is not starting up because of a broken plugin or misconfiguration, use the <a ng-href="{{ '/terminal.html?id=' + app.id }}" target="_blank">Terminal</a>
               and click 'Pause' to edit the app's filesystem.</p>
 
-            <p ng-show="app.error">An error occurred during the <b>{{ app.error.task | taskName }}</b> operation: <span class="text-danger"><b>{{ app.error.reason + ': ' + app.error.message }}</b></span></p>
+            <p ng-show="app.error">An error occurred during the <b>{{ app.error.installationState | taskName }}</b> operation: <span class="text-danger"><b>{{ app.error.reason + ': ' + app.error.message }}</b></span></p>
             <!--<p ng-show="app.error" class="text-info"><b>{{ app.error | errorSuggestion }}</b></p>-->
             <button class="btn btn-success pull-right" ng-click="repair.show()" ng-disabled="app.taskId">Repair</button>