Fix error with remove_site_blocks in the Images tab

app/filter.py

@@ -125,6 +125,9 @@ class Filter:
     def remove_site_blocks(self, soup) -> None:
         if not self.config.block:
             return
+        
+        if not soup.body:
+            return
         search_string = ' '.join(['-site:' +
                                  _ for _ in self.config.block.split(',')])
         selected = soup.body.findAll(text=re.compile(search_string))