diff --git a/ts3-client/core/src/main/java/com/ts3client/net/TeamspeakConnection.java b/ts3-client/core/src/main/java/com/ts3client/net/TeamspeakConnection.java
index 26875ec..a809e0d 100644
--- a/ts3-client/core/src/main/java/com/ts3client/net/TeamspeakConnection.java
+++ b/ts3-client/core/src/main/java/com/ts3client/net/TeamspeakConnection.java
@@ -1,6 +1,7 @@
 package com.ts3client.net;
 
 import com.github.manevolent.ts3j.api.Client;
+import com.github.manevolent.ts3j.command.CommandException;
 import com.github.manevolent.ts3j.command.MultiCommand;
 import com.github.manevolent.ts3j.command.SingleCommand;
 import com.github.manevolent.ts3j.command.parameter.CommandParameter;
@@ -60,6 +61,10 @@ public final class TeamspeakConnection implements TS3Listener {
     private static final int REASON_KICK_CHANNEL = 4;
     private static final int REASON_KICK_SERVER = 5;
 
+    private static final int ERROR_PERMISSIONS_CLIENT_INSUFFICIENT = 0x0a08;
+    private static final int ERROR_PERMISSIONS_INSUFFICIENT_GROUP_POWER = 0x0a09;
+    private static final int ERROR_PERMISSIONS_INSUFFICIENT_PERMISSION_POWER = 0x0a0a;
+
     /** Shortest gap between two "you are talking while muted" reminders. */
     private static final long MUTED_TALK_COOLDOWN_NANOS = 5_000_000_000L;
 
@@ -431,7 +436,7 @@ public final class TeamspeakConnection implements TS3Listener {
                     ? null : channelPassword);
         } catch (Exception e) {
             if (!connected) return;
-            error("Could not join channel \"" + target.name + "\": " + rootMessage(e));
+            error("Could not join channel \"" + target.name + "\": ", e);
         }
     }
 
@@ -1125,7 +1130,7 @@ public final class TeamspeakConnection implements TS3Listener {
 
     /** Sends a request in the background, reporting a failure as {@code errorPrefix} and the reason. */
     private void act(String errorPrefix, Action action) {
-        submit(action, e -> error(errorPrefix + rootMessage(e)));
+        submit(action, e -> error(errorPrefix, e));
     }
 
     /** Sends a request in the background whose failure nobody needs to hear about. */
@@ -1596,17 +1601,24 @@ public final class TeamspeakConnection implements TS3Listener {
     }
 
     /** Reports a failure to the UI and plays the matching server sound. */
-    private void error(String message) {
-        sound(isPermissionError(message)
+    private void error(String prefix, Exception e) {
+        sound(isPermissionError(e)
                 ? SoundEvent.SERVER_INSUFFICIENT_PERMISSIONS
                 : SoundEvent.SERVER_ERROR, serverVars());
-        ui.onError(message);
+        ui.onError(prefix + rootMessage(e));
     }
 
-    private static boolean isPermissionError(String message) {
-        if (message == null) return false;
-        String m = message.toLowerCase(java.util.Locale.ROOT);
-        return m.contains("insufficient") || m.contains("permission");
+    /** Whether the server refused for lack of permission, wherever in the cause chain it said so. */
+    private static boolean isPermissionError(Throwable t) {
+        for (Throwable c = t; c != null; c = c.getCause() == c ? null : c.getCause()) {
+            if (c instanceof CommandException ce) {
+                int id = ce.getErrorId();
+                return id == ERROR_PERMISSIONS_CLIENT_INSUFFICIENT
+                        || id == ERROR_PERMISSIONS_INSUFFICIENT_GROUP_POWER
+                        || id == ERROR_PERMISSIONS_INSUFFICIENT_PERMISSION_POWER;
+            }
+        }
+        return false;
     }
 
     /** Whether the client is in the channel we are in ourselves. Package-private: also