diff --git a/flaschengeist/app.py b/flaschengeist/app.py
index e91f000..0012c6f 100644
--- a/flaschengeist/app.py
+++ b/flaschengeist/app.py
@@ -54,6 +54,8 @@ def __load_plugins(app):
                 logger.error(
                     f"Plugin {entry_point.name} was enabled, but could not be loaded due to an error.", exc_info=True
                 )
+                del plugin
+                continue
         if isinstance(plugin, AuthPlugin):
             logger.debug(f"Found authentication plugin: {entry_point.name}")
             if entry_point.name == config["FLASCHENGEIST"]["auth"]:
@@ -65,6 +67,7 @@ def __load_plugins(app):
             app.config["FG_PLUGINS"][entry_point.name] = plugin
     if "FG_AUTH_BACKEND" not in app.config:
         logger.error("No authentication plugin configured or authentication plugin not found")
+        raise RuntimeError("No authentication plugin configured or authentication plugin not found")
 
 
 def install_all():