Update app_rvc.py

app_rvc.py

@@ -344,7 +344,7 @@ class SoniTranslate(SoniTrCache):
         link_media_arg = get_link_list(link_media_arg)
 
         path_arg = kwargs[2]
-        path_arg = [x.strip() for x in path_arg.split(',')]
+        path_arg = [x.strip() for x in (path_arg or '').split(',')]
         path_arg = get_valid_files(path_arg)
 
         edit_text_arg = kwargs[31]