add exception catch for cache read from file

plugins/Common.php

@@ -564,6 +564,7 @@ Class Common {
         $cache_filename = "{$cacheDir}{$key}.json";
 
         if (file_exists($cache_filename)) {
+            try {
                 $jsonData = file_get_contents($cache_filename);
                 $data = json_decode($jsonData, true);
 
@@ -574,6 +575,9 @@ Class Common {
                 }else {
                     return null;
                 }
+            }catch(Exception $e) {
+                return false;
+            }
         }
 
         return false;