diff --git a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/EventListComposite.java b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/EventListComposite.java
index 5afbea89d6b..7003e0b3bc7 100644
--- a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/EventListComposite.java
+++ b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/EventListComposite.java
@@ -16,6 +16,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
+import java.util.function.Consumer;
+
 import com.google.gwt.cell.client.AbstractCell;
 import com.google.gwt.cell.client.SafeHtmlCell;
 import com.google.gwt.cell.client.ValueUpdater;
@@ -329,12 +331,25 @@ public class EventListComposite extends Composite implements EventsRefresher, Le
         });
         final DialogConfig<EventDTO> config = EditOwnershipDialog.create(userService.getUserManagementService(), EVENT,
                 event -> fillEvents(), stringMessages);
-        actionsColumn.addAction(EventConfigImagesBarCell.ACTION_CHANGE_OWNERSHIP, CHANGE_OWNERSHIP, config::openOwnershipDialog);
+        actionsColumn.addAction(EventConfigImagesBarCell.ACTION_CHANGE_OWNERSHIP, CHANGE_OWNERSHIP,
+                // Explicitly using an anonymous inner class. Using a method reference caused problems with the GWT compiler (see bug 5269)
+                new Consumer<EventDTO>() {
+                    @Override
+                    public void accept(EventDTO t) {
+                        config.openOwnershipDialog(t);
+                    }
+                });
         
         final EditACLDialog.DialogConfig<EventDTO> configACL = EditACLDialog.create(
                 userService.getUserManagementService(), EVENT, event -> fillEvents(), stringMessages);
         actionsColumn.addAction(EventConfigImagesBarCell.ACTION_CHANGE_ACL, DefaultActions.CHANGE_ACL,
-                e -> configACL.openACLDialog(e));
+                // Explicitly using an anonymous inner class. Using a method reference caused problems with the GWT compiler (see bug 5269)
+                new Consumer<EventDTO>() {
+                    @Override
+                    public void accept(EventDTO e) {
+                        configACL.openACLDialog(e);
+                    }
+                });
 
         final MigrateGroupOwnershipDialog.DialogConfig<EventDTO> migrateDialogConfig = MigrateGroupOwnershipDialog
                 .create(userService.getUserManagementService(), (event, dto) -> {
@@ -351,7 +366,13 @@ public class EventListComposite extends Composite implements EventsRefresher, Le
                     });
                 });
         actionsColumn.addAction(EventConfigImagesBarCell.ACTION_MIGRATE_GROUP_OWNERSHIP_HIERARCHY, CHANGE_OWNERSHIP,
-                migrateDialogConfig::openDialog);
+                // Explicitly using an anonymous inner class. Using a method reference caused problems with the GWT compiler (see bug 5269)
+                new Consumer<EventDTO>() {
+                    @Override
+                    public void accept(EventDTO t) {
+                        migrateDialogConfig.openDialog(t);
+                    }
+                });
 
         eventNameColumn.setSortable(true);
         venueNameColumn.setSortable(true);
diff --git a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/LeaderboardGroupConfigPanel.java b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/LeaderboardGroupConfigPanel.java
index 40a2ca965b7..3a536390088 100644
--- a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/LeaderboardGroupConfigPanel.java
+++ b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/adminconsole/LeaderboardGroupConfigPanel.java
@@ -15,6 +15,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
+import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
@@ -596,13 +597,25 @@ public class LeaderboardGroupConfigPanel extends AbstractRegattaPanel
                 userService.getUserManagementService(), type,
                 group -> leaderboardGroupsRefresher.fillLeaderboardGroups(), stringMessages);
         actionsColumn.addAction(LeaderboardGroupConfigImagesBarCell.ACTION_CHANGE_OWNERSHIP, CHANGE_OWNERSHIP,
-                e -> config.openOwnershipDialog(e));
+                // Explicitly using an anonymous inner class. Using a method reference caused problems with the GWT compiler (see bug 5269)
+                new Consumer<LeaderboardGroupDTO>() {
+                    @Override
+                    public void accept(LeaderboardGroupDTO e) {
+                        config.openOwnershipDialog(e);
+                    }
+                });
         
         final EditACLDialog.DialogConfig<LeaderboardGroupDTO> configACL = EditACLDialog.create(
                 userService.getUserManagementService(), type,
                 group -> leaderboardGroupsRefresher.fillLeaderboardGroups(), stringMessages);
         actionsColumn.addAction(LeaderboardGroupConfigImagesBarCell.ACTION_CHANGE_ACL, DefaultActions.CHANGE_ACL,
-                e -> configACL.openACLDialog(e));
+                // Explicitly using an anonymous inner class. Using a method reference caused problems with the GWT compiler (see bug 5269)
+                new Consumer<LeaderboardGroupDTO>() {
+                    @Override
+                    public void accept(LeaderboardGroupDTO e) {
+                        configACL.openACLDialog(e);
+                    }
+                });
         
         final MigrateGroupOwnershipDialog.DialogConfig<LeaderboardGroupDTO> migrateDialogConfig = MigrateGroupOwnershipDialog
                 .create(userService.getUserManagementService(), (lg, dto) -> {
@@ -620,7 +633,13 @@ public class LeaderboardGroupConfigPanel extends AbstractRegattaPanel
                             });
                 });
         actionsColumn.addAction(EventConfigImagesBarCell.ACTION_MIGRATE_GROUP_OWNERSHIP_HIERARCHY, CHANGE_OWNERSHIP,
-                e -> migrateDialogConfig.openDialog(e));
+                // Explicitly using an anonymous inner class. Using a method reference caused problems with the GWT compiler (see bug 5269)
+                new Consumer<LeaderboardGroupDTO>() {
+                    @Override
+                    public void accept(LeaderboardGroupDTO e) {
+                        migrateDialogConfig.openDialog(e);
+                    }
+                });
 
         SelectionCheckboxColumn<LeaderboardGroupDTO> leaderboardTableSelectionColumn =
                 new SelectionCheckboxColumn<LeaderboardGroupDTO>(