diff --git a/src/main/java/net/raphimc/viaproxy/plugins/events/UITabInitializeEvent.java b/src/main/java/net/raphimc/viaproxy/plugins/events/UITabInitializeEvent.java
new file mode 100644
index 00000000..43f95e90
--- /dev/null
+++ b/src/main/java/net/raphimc/viaproxy/plugins/events/UITabInitializeEvent.java
@@ -0,0 +1,45 @@
+/*
+ * This file is part of ViaProxy - https://github.com/RaphiMC/ViaProxy
+ * Copyright (C) 2021-2026 RK_01/RaphiMC and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package net.raphimc.viaproxy.plugins.events;
+
+import net.raphimc.viaproxy.plugins.events.types.EventCancellable;
+import net.raphimc.viaproxy.ui.UITab;
+import net.raphimc.viaproxy.ui.ViaProxyWindow;
+
+public class UITabInitializeEvent extends EventCancellable {
+
+    private final ViaProxyWindow window;
+    private UITab tab;
+
+    public UITabInitializeEvent(ViaProxyWindow window, UITab tab) {
+        this.window = window;
+        this.tab = tab;
+    }
+
+    public ViaProxyWindow getWindow() {
+        return window;
+    }
+
+    public UITab getTab() {
+        return tab;
+    }
+
+    public void setTab(UITab tab) {
+        this.tab = tab;
+    }
+}
diff --git a/src/main/java/net/raphimc/viaproxy/saves/impl/AccountsSave.java b/src/main/java/net/raphimc/viaproxy/saves/impl/AccountsSave.java
index 259e1746..708134a0 100644
--- a/src/main/java/net/raphimc/viaproxy/saves/impl/AccountsSave.java
+++ b/src/main/java/net/raphimc/viaproxy/saves/impl/AccountsSave.java
@@ -35,6 +35,7 @@
 public class AccountsSave extends AbstractSave {
 
     private final List<Account> accounts = new ArrayList<>();
+    private final List<JsonObject> unknownAccounts = new ArrayList<>();
 
     public AccountsSave() {
         super("accountsV4");
@@ -48,17 +49,30 @@ public void load(JsonElement jsonElement) throws Exception {
 
         this.accounts.clear();
         for (JsonElement element : jsonElement.getAsJsonArray()) {
+            JsonObject jsonObject = null;
             try {
-                final JsonObject jsonObject = element.getAsJsonObject();
-                final String type = jsonObject.get("accountType").getAsString();
+                jsonObject = element.getAsJsonObject();
+                if (!jsonObject.has("accountType")) {
+                    Logger.LOGGER.error("Failed to load an account, missing accountType");
+                    continue;
+                }
+
+                String type = jsonObject.get("accountType").getAsString();
                 final Class<?> clazz = Classes.find(type, true, classLoaders);
 
                 final Account account = (Account) clazz.getConstructor(JsonObject.class).newInstance(jsonObject);
                 this.accounts.add(account);
-            } catch (Throwable e) {
-                Logger.LOGGER.error("Failed to load an account", e);
+            } catch (Throwable t) {
+                if (t instanceof ClassNotFoundException classNotFoundException) {
+                    Logger.LOGGER.error("Failed to load an account, unknown accountType: " + classNotFoundException.getMessage());
+                    this.unknownAccounts.add(jsonObject);
+                    continue;
+                }
+
+                Logger.LOGGER.error("Failed to load an account", t);
             }
         }
+        Logger.LOGGER.info("Loaded " + this.accounts.size() + " accounts, " + this.unknownAccounts.size() + " unknown accounts");
     }
 
     @Override
@@ -69,6 +83,7 @@ public JsonElement save() {
             jsonObject.addProperty("accountType", account.getClass().getName());
             array.add(jsonObject);
         }
+        this.unknownAccounts.forEach(array::add);
         return array;
     }
 
diff --git a/src/main/java/net/raphimc/viaproxy/ui/ViaProxyWindow.java b/src/main/java/net/raphimc/viaproxy/ui/ViaProxyWindow.java
index c4bd1807..9c81cad7 100644
--- a/src/main/java/net/raphimc/viaproxy/ui/ViaProxyWindow.java
+++ b/src/main/java/net/raphimc/viaproxy/ui/ViaProxyWindow.java
@@ -25,6 +25,7 @@
 import net.lenni0451.reflect.JavaBypass;
 import net.lenni0451.reflect.stream.RStream;
 import net.raphimc.viaproxy.ViaProxy;
+import net.raphimc.viaproxy.plugins.events.UITabInitializeEvent;
 import net.raphimc.viaproxy.ui.events.UICloseEvent;
 import net.raphimc.viaproxy.ui.impl.*;
 import net.raphimc.viaproxy.util.logging.Logger;
@@ -111,8 +112,17 @@ private void initTabs() {
                 .fields()
                 .filter(field -> UITab.class.isAssignableFrom(field.type()))
                 .forEach(field -> {
-                    final UITab tab = field.get();
-                    this.tabs.add(field.get());
+                    UITab tab = field.get();
+
+                    UITabInitializeEvent event = ViaProxy.EVENT_MANAGER.call(new UITabInitializeEvent(ViaProxyWindow.this, tab));
+                    if (event.isCancelled())
+                        return;
+
+                    tab = event.getTab();
+                    if (tab == null)
+                        throw new IllegalStateException("UITabInitializeEvent returned null tab");
+
+                    this.tabs.add(tab);
                     tab.add(this.contentPane);
                     this.eventManager.register(tab);
                 });