Good evening. For the past week, my bot has intermittently been seeing this error when it tries to edit or upload:

API Error: Array ( [code] => badtoken [info] => Invalid token [*] => See http://commons.wikimedia.org/w/api.php for API usage )

It is unpredictable; it will occasionally fail for one thread, and then work for a thread an hour later. Deleting the cookies has on occasion fixed the issue for a few days.

Is there anything that can be done to fix this? Magog