diff --git a/docs/walkthrough.rst b/docs/walkthrough.rst
index e199aba..a367f28 100644
--- a/docs/walkthrough.rst
+++ b/docs/walkthrough.rst
@@ -408,7 +408,7 @@ This should keep the Logistic Regression at its default values. If you'll notice
 
 .. admonition:: Appending original features to the meta-features
 
-   As of 0.4.0, Xcessiv no longer provides the checkbox option to append the original features to the meta-features. However, this functionality can be achieved by using the preset "Identity Transformer" and including this as a base learner in the ensemble. This approach reinforces the fact that a base learner is simply something that generates meta-features from features, and one that lets all features pass through unchanged fits this description.
+   As of 0.3.8, Xcessiv no longer provides the checkbox option to append the original features to the meta-features. However, this functionality can be achieved by using the preset "Identity Transformer" and including this as a base learner in the ensemble. This approach reinforces the fact that a base learner is simply something that generates meta-features from features, and one that lets all features pass through unchanged fits this description.
 
 
 After a short time, your ensemble should finish processing, and you'll be able to see its performance. Here we get an accuracy of 0.968, which is higher than any individual base learner.
diff --git a/xcessiv/ui/src/containers/ContainerBaseLearner.js b/xcessiv/ui/src/containers/ContainerBaseLearner.js
index 4807c84..ed32c04 100644
--- a/xcessiv/ui/src/containers/ContainerBaseLearner.js
+++ b/xcessiv/ui/src/containers/ContainerBaseLearner.js
@@ -99,12 +99,22 @@ class ContainerBaseLearner extends Component {
   // Refresh base learner origins from server data
   refreshBaseLearnerOrigins(path) {
     fetch('/ensemble/base-learner-origins/?path=' + path)
+    .then(handleErrors)
     .then(response => response.json())
     .then(json => {
       console.log(json);
       this.setState({
         baseLearnerOrigins: json
       });
+    })
+    .catch(error => {
+      console.log(error.message);
+      console.log(error.errMessage);
+      this.props.addNotification({
+        title: error.message,
+        message: error.errMessage,
+        level: 'error'
+      });
     });
   }
 
@@ -525,6 +535,11 @@ class ContainerBaseLearner extends Component {
       console.log(error.message);
       console.log(error.errMessage);
       this.refreshingSE = false;
+      this.props.addNotification({
+        title: error.message,
+        message: error.errMessage,
+        level: 'error'
+      });
     });
   }