Kb69
Emulab FAQ: Getting Started: Forgot your password? Resetting does not work!
People often report that the link to reset their password (after forgetting it) fails with the seemingly obscure error:
Invalid page arguments: /chpasswd.php3?reset_uid=joeuser&key=0641d88cf3abb16d&simple=0
This typically happens because you are using a different browser for the link you got in the email message, then you did when initially making the chpasswd request.
We store a cookie (1/2 of the above key) in the browser, and if you fire up a new browser (invocation, as some email clients will do) instead of using the same browser, that cookie will be missing.
Solution: Paste the link you get in the email message, into the same browser invocation that you used to make the Change Password request.