diff --git a/app/build.gradle b/app/build.gradle
index c9bd78a..db912c8 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -7,8 +7,8 @@ android {
         applicationId "de.sebse.fuplanner"
         minSdkVersion 15
         targetSdkVersion 28
-        versionCode 6
-        versionName "1.1.4"
+        versionCode 7
+        versionName "1.1.5"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
diff --git a/app/src/main/java/de/sebse/fuplanner/services/KVV/KVVLogin.java b/app/src/main/java/de/sebse/fuplanner/services/KVV/KVVLogin.java
index bd8c32f..03604a7 100644
--- a/app/src/main/java/de/sebse/fuplanner/services/KVV/KVVLogin.java
+++ b/app/src/main/java/de/sebse/fuplanner/services/KVV/KVVLogin.java
@@ -215,10 +215,16 @@ class KVVLogin extends HTTPService {
         cookies.put("ROUTEID", ROUTEID);
         cookies.put("_idp_session", _idp_session);
         get("https://identity.fu-berlin.de/idp-fub/profile/SAML2/Redirect/SSO", cookies, response -> {
+            String body = response.getParsed();
+            if (body == null) {
+                errorCallback.onError(new NetworkError(100143, -1, "Error on getting SAML response!"));
+                return;
+            }
+            
             HashMap<String, String> object = new HashMap<>();
 
             Pattern pattern = Pattern.compile("ss&#x3a;mem&#x3a;([0-9a-f]+)");
-            Matcher matcher = pattern.matcher(response.getParsed());
+            Matcher matcher = pattern.matcher(body);
             if (!matcher.find()) {
                 errorCallback.onError(new NetworkError(100142, -1, "Error on getting SAML response!"));
                 return;
@@ -226,7 +232,7 @@ class KVVLogin extends HTTPService {
             object.put("RelayState", "ss:mem:"+matcher.group(1));
 
             pattern = Pattern.compile("name=\"SAMLResponse\" value=\"([0-9a-zA-Z+]+=*)");
-            matcher = pattern.matcher(response.getParsed());
+            matcher = pattern.matcher(body);
             if (!matcher.find()) {
                 errorCallback.onError(new NetworkError(100141, -1, "Error on getting SAML response!"));
                 return;
diff --git a/app/src/main/java/de/sebse/fuplanner/services/KVV/TestLogin.java b/app/src/main/java/de/sebse/fuplanner/services/KVV/TestLogin.java
index 473f0cb..48c9449 100644
--- a/app/src/main/java/de/sebse/fuplanner/services/KVV/TestLogin.java
+++ b/app/src/main/java/de/sebse/fuplanner/services/KVV/TestLogin.java
@@ -20,6 +20,10 @@ final class TestLogin extends HTTPService {
     static void testLogin(Context context, LoginToken loginToken, NetworkCallback<LoginToken> callback, NetworkErrorCallback errorCallback) {
         new TestLogin(context).get(String.format("https://kvv.imp.fu-berlin.de/direct/profile/%s.json", loginToken.getUsername()), loginToken.getCookies(), response -> {
             String body = response.getParsed();
+            if (body == null) {
+                errorCallback.onError(new NetworkError(100202, 403, "Testing login failed!"));
+                return;
+            }
             try {
                 JSONObject json = new JSONObject(body);
                 String displayName = json.getString("displayName");
diff --git a/app/src/main/java/de/sebse/fuplanner/tools/network/Result.java b/app/src/main/java/de/sebse/fuplanner/tools/network/Result.java
index 496f860..c295181 100644
--- a/app/src/main/java/de/sebse/fuplanner/tools/network/Result.java
+++ b/app/src/main/java/de/sebse/fuplanner/tools/network/Result.java
@@ -5,19 +5,24 @@ import com.android.volley.toolbox.HttpHeaderParser;
 import java.io.UnsupportedEncodingException;
 import java.util.Map;
 
+import androidx.annotation.Nullable;
+
 /**
  * Created by sebastian on 24.10.17.
  */
 public class Result {
-    private final byte[] body;
+    @Nullable private final byte[] body;
     private final Map<String, String> headers;
 
-    public Result(byte[] body, Map<String, String> headers) {
+    Result(@Nullable byte[] body, Map<String, String> headers) {
         this.body = body;
         this.headers = headers;
     }
 
+    @Nullable
     public String getParsed() {
+        if (this.body == null)
+            return null;
         try {
             return new String(this.body, HttpHeaderParser.parseCharset(headers));
         } catch (UnsupportedEncodingException e) {
@@ -25,6 +30,7 @@ public class Result {
         }
     }
 
+    @Nullable
     public byte[] getBytes() {
         return body;
     }