Add try catch to avoid error when loading a invalid URL see #14784

plugin/rss/index.php

@@ -16,10 +16,9 @@ if (empty($url)) {
 
     return;
 }
-
-$channel = Reader::import($url);
-
-if (!empty($channel)) {
+try {
+    $channel = Reader::import($url);
+    if (!empty($channel)) {
         /** @var FeedInterface $item */
         foreach ($channel as $item) {
             $title = $item->getTitle();
@@ -29,4 +28,8 @@ if (!empty($channel)) {
             }
             echo Display::panel($item->getDescription(), $title);
         }
+    }
+} catch (Exception $e) {
+    echo Display::return_message($plugin->get_lang('no_valid_rss'), 'warning');
+    error_log($e->getMessage());
 }

plugin/rss/lang/english.php

@@ -13,3 +13,4 @@ $strings['block_title'] = "Block title";
 
 $strings['title'] = "Title";
 $strings['no_rss'] = "There is no RSS configured. Please add a RSS";
+$strings['no_valid_rss'] = "Please check if the URL contains a valid RSS URL";