If you cannot add new snipe and receive error -20004 or 17470, it means that your eBay security token is about to expire or already expired.
Just renew the token and you will be good to go.
To renew, please follow instruction here.
>> eBay Security Token <<
If it still does not work, try to clear cache by visiting this link before you proceed to re-authorize the new security token.
https://justsnipe.com/clearcache
We’ll be doing brief maintenance on our server beginning at 00:00 to 03:00 11/13/2020 (Pacific Time). During the maintenance, JustSnipe may become slower or unresponsive.
If you have active snipe during this time, it may not be executed and you may lose that auction. Certain parts of our website will not be accessible and may display "Temporary Error" message.
We are sorry for the short notification and thank you for your patience.