fixes index out fo range bug

archivers/telegram_archiver.py

@@ -43,8 +43,10 @@ class TelegramArchiver(Archiver):
                 images += urls
 
             page_cdn, page_hash, thumbnail = self.generate_media_page(images, url, html.escape(str(t.content)))
+            time_elements = s.find_all('time')
+            timestamp = time_elements[0].get('datetime') if len(time_elements) else None
 
-            return ArchiveResult(status="success", cdn_url=page_cdn, screenshot=screenshot, hash=page_hash, thumbnail=thumbnail, timestamp=s.find_all('time')[0].get('datetime'))
+            return ArchiveResult(status="success", cdn_url=page_cdn, screenshot=screenshot, hash=page_hash, thumbnail=thumbnail, timestamp=timestamp)
 
         video_url = video.get('src')
         video_id = video_url.split('/')[-1].split('?')[0]