From 97041abaa40af15fc440b077687326c1ad7d7adc Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Sat, 24 Apr 2021 12:04:33 +0530
Subject: [PATCH] Ignore failures to load cached metadata plugins

---
 src/calibre/ebooks/metadata/sources/update.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/metadata/sources/update.py b/src/calibre/ebooks/metadata/sources/update.py
index 0f13c9add2..c43836c61d 100644
--- a/src/calibre/ebooks/metadata/sources/update.py
+++ b/src/calibre/ebooks/metadata/sources/update.py
@@ -82,7 +82,10 @@ def patch_plugins():
             continue
         if name == 'search_engines':
             patch_search_engines(val)
-        p = load_plugin(val)
+        try:
+            p = load_plugin(val)
+        except Exception:
+            p = None
         if p is not None:
             patches[p.name] = p
     patch_metadata_plugins(patches)