diff --git a/lib/Data/Internal/DBus.hs b/lib/Data/Internal/DBus.hs
index baf64a0..c18bc8d 100644
--- a/lib/Data/Internal/DBus.hs
+++ b/lib/Data/Internal/DBus.hs
@@ -278,14 +278,21 @@ omInterfacesRemoved :: MemberName
 omInterfacesRemoved = memberName_ "InterfacesRemoved"
 
 callGetManagedObjects
-  :: (MonadUnliftIO m, SafeClient c)
+  :: (MonadReader env m, HasLogFunc env, MonadUnliftIO m, SafeClient c)
   => c
   -> BusName
   -> ObjectPath
   -> m ObjectTree
-callGetManagedObjects cl bus path =
-  either (const M.empty) (fromMaybe M.empty . fromSingletonVariant)
-    <$> callMethod cl bus path omInterface getManagedObjects
+callGetManagedObjects cl bus path = do
+  res <- callMethod cl bus path omInterface getManagedObjects
+  case res of
+    Left err -> do
+      logError $ Utf8Builder $ encodeUtf8Builder err
+      return M.empty
+    Right v -> return $ fromMaybe M.empty $ fromSingletonVariant v
+
+-- either (const M.empty) (fromMaybe M.empty . fromSingletonVariant)
+--   <$>
 
 addInterfaceChangedListener
   :: (MonadReader env m, HasLogFunc env, MonadUnliftIO m, SafeClient c)
diff --git a/lib/Xmobar/Plugins/Bluetooth.hs b/lib/Xmobar/Plugins/Bluetooth.hs
index 4173ca8..58536c0 100644
--- a/lib/Xmobar/Plugins/Bluetooth.hs
+++ b/lib/Xmobar/Plugins/Bluetooth.hs
@@ -164,7 +164,10 @@ adaptorHasDevice adaptor device = case splitPathNoRoot device of
 splitPathNoRoot :: ObjectPath -> [FilePath]
 splitPathNoRoot = dropWhile (== "/") . splitDirectories . formatObjectPath
 
-getBtObjectTree :: MonadUnliftIO m => SysClient -> m ObjectTree
+getBtObjectTree
+  :: (MonadReader env m, HasLogFunc env, MonadUnliftIO m)
+  => SysClient
+  -> m ObjectTree
 getBtObjectTree sys = callGetManagedObjects sys btBus btOMPath
 
 btOMPath :: ObjectPath
diff --git a/lib/Xmobar/Plugins/VPN.hs b/lib/Xmobar/Plugins/VPN.hs
index 5c50618..0de5391 100644
--- a/lib/Xmobar/Plugins/VPN.hs
+++ b/lib/Xmobar/Plugins/VPN.hs
@@ -52,7 +52,10 @@ type VPNState = S.Set ObjectPath
 
 type MutableVPNState = MVar VPNState
 
-initState :: MonadUnliftIO m => SysClient -> m MutableVPNState
+initState
+  :: (MonadReader env m, HasLogFunc env, MonadUnliftIO m)
+  => SysClient
+  -> m MutableVPNState
 initState client = do
   ot <- getVPNObjectTree client
   newMVar $ findTunnels ot
@@ -71,7 +74,10 @@ updateState f state op = modifyMVar_ state $ return . f op
 --------------------------------------------------------------------------------
 -- Tunnel Device Detection
 
-getVPNObjectTree :: MonadUnliftIO m => SysClient -> m ObjectTree
+getVPNObjectTree
+  :: (MonadReader env m, HasLogFunc env, MonadUnliftIO m)
+  => SysClient
+  -> m ObjectTree
 getVPNObjectTree sys = callGetManagedObjects sys vpnBus vpnPath
 
 findTunnels :: ObjectTree -> VPNState