diff --git a/findbugs-excludes.xml b/findbugs-excludes.xml
index b18fa80f..f00fbd66 100644
--- a/findbugs-excludes.xml
+++ b/findbugs-excludes.xml
@@ -35,5 +35,19 @@
       <Package name="ch.ethz.seb.sebserver.gui.service.page" />
       <Bug pattern="URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD" />
     </Match>
+    <Match>
+      <Package name="ch.ethz.seb.sebserver.gui.service.page" />
+      <Bug pattern="URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD" />
+    </Match>
+    <Match>
+      <Package name="ch.ethz.seb.sebserver.webservice.servicelayer.session.impl.proctoring" />
+      <Bug pattern="URF_UNREAD_FIELD" />
+    </Match>
+    <Match>
+      <Package name="ch.ethz.seb.sebserver.webservice.servicelayer.session.impl.proctoring" />
+      <Bug pattern="SS_SHOULD_BE_STATIC" />
+    </Match>
+    
+    
 
 </FindBugsFilter>
\ No newline at end of file
diff --git a/src/main/java/ch/ethz/seb/sebserver/gbl/model/session/ClientConnectionData.java b/src/main/java/ch/ethz/seb/sebserver/gbl/model/session/ClientConnectionData.java
index 3092f078..4916e3ce 100644
--- a/src/main/java/ch/ethz/seb/sebserver/gbl/model/session/ClientConnectionData.java
+++ b/src/main/java/ch/ethz/seb/sebserver/gbl/model/session/ClientConnectionData.java
@@ -100,7 +100,8 @@ public class ClientConnectionData {
         while (i1.hasNext()) {
             final IndicatorValue iv1 = i1.next();
             final IndicatorValue iv2 = i2.next();
-            if (iv1.getIndicatorId() != iv2.getIndicatorId() || Math.abs(iv1.getValue() - iv2.getValue()) > 0.1) {
+            if (iv1.getIndicatorId().longValue() != iv2.getIndicatorId().longValue() ||
+                    Math.abs(iv1.getValue() - iv2.getValue()) > 0.1) {
                 return false;
             }
         }
diff --git a/src/main/java/ch/ethz/seb/sebserver/gui/content/activity/ActivitiesPane.java b/src/main/java/ch/ethz/seb/sebserver/gui/content/activity/ActivitiesPane.java
index a0e8b7d9..35b35bd0 100644
--- a/src/main/java/ch/ethz/seb/sebserver/gui/content/activity/ActivitiesPane.java
+++ b/src/main/java/ch/ethz/seb/sebserver/gui/content/activity/ActivitiesPane.java
@@ -472,7 +472,7 @@ public class ActivitiesPane implements TemplateComposer {
                     ? tree.getSelection()[0]
                     : (TreeItem) event.item;
 
-            if (treeItem.getItemCount() > 0 && !treeItem.getExpanded()) {
+            if (treeItem == null || (treeItem.getItemCount() > 0 && !treeItem.getExpanded())) {
                 return;
             }
 
diff --git a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/lms/impl/LmsAPIServiceImpl.java b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/lms/impl/LmsAPIServiceImpl.java
index 5f363f14..95a7e9f9 100644
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/lms/impl/LmsAPIServiceImpl.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/lms/impl/LmsAPIServiceImpl.java
@@ -193,7 +193,7 @@ public class LmsAPIServiceImpl implements LmsAPIService {
                     final LmsAPITemplate template = getLmsAPITemplate(lmsSetupId)
                             .getOrThrow();
 
-                    if (institutionId != null && template.lmsSetup().institutionId != institutionId) {
+                    if (institutionId != null && institutionId.equals(template.lmsSetup().institutionId)) {
                         return Collections.emptyList();
                     }
                     return template
diff --git a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/lms/impl/olat/OlatLmsAPITemplate.java b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/lms/impl/olat/OlatLmsAPITemplate.java
index 27408b08..3a84b410 100644
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/lms/impl/olat/OlatLmsAPITemplate.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/lms/impl/olat/OlatLmsAPITemplate.java
@@ -222,7 +222,7 @@ public class OlatLmsAPITemplate extends AbstractCachedCourseAccess implements Lm
 
     private List<QuizData> collectAllQuizzes(final OlatLmsRestTemplate restTemplate, final FilterMap filterMap) {
         final LmsSetup lmsSetup = this.apiTemplateDataSupplier.getLmsSetup();
-        final String quizName = filterMap.getString(QuizData.FILTER_ATTR_QUIZ_NAME);
+        final String quizName = (filterMap != null) ? filterMap.getString(QuizData.FILTER_ATTR_QUIZ_NAME) : null;
         final DateTime quizFromTime = (filterMap != null) ? filterMap.getQuizFromTime() : null;
         final long fromCutTime = (quizFromTime != null) ? Utils.toUnixTimeInSeconds(quizFromTime) : -1;
 
diff --git a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/AbstractCertificateCryptor.java b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/AbstractCertificateCryptor.java
index 4da634c7..84eb9115 100644
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/AbstractCertificateCryptor.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/sebconfig/impl/AbstractCertificateCryptor.java
@@ -11,8 +11,8 @@ package ch.ethz.seb.sebserver.webservice.servicelayer.sebconfig.impl;
 import java.io.IOException;
 import java.io.InputStream;
 import java.security.cert.Certificate;
+import java.util.Arrays;
 import java.util.Enumeration;
-import java.util.Objects;
 
 import javax.crypto.Cipher;
 
@@ -49,7 +49,7 @@ public abstract class AbstractCertificateCryptor {
             while (engineAliases.hasMoreElements()) {
                 final Certificate certificate = certs.keyStore.engineGetCertificate(engineAliases.nextElement());
                 final byte[] otherPublicKeyHash = generatePublicKeyHash(certificate);
-                if (Objects.equals(otherPublicKeyHash, publicKeyHash)) {
+                if (Arrays.equals(otherPublicKeyHash, publicKeyHash)) {
                     return certificate;
                 }
             }