--- a/eric6/Tools/TRPreviewer.py	Wed Apr 14 19:38:19 2021 +0200
+++ b/eric6/Tools/TRPreviewer.py	Wed Apr 14 19:59:16 2021 +0200
@@ -8,6 +8,7 @@
 """
 
 import os
+import contextlib
 
 from PyQt5.QtCore import (
     QDir, QTimer, QFileInfo, pyqtSignal, QEvent, QSize, QTranslator, QObject,
@@ -723,10 +724,8 @@
             del self.__widget
             self.__widget = None
         
-        try:
+        with contextlib.suppress(Exception):
             self.__widget = uic.loadUi(self.__uiFileName)
-        except Exception:       # secok
-            pass
         
         if not self.__widget:
             E5MessageBox.warning(