If you check the status of this snipe, you will see that eBay refused your login.
This is probably related to the recent eBay security breach.
eBay requires to change your password on your eBay account in order for your account to work.
Once you changed your password, please don't forget to re-login into the sniper using your updated login information to keep it in sync.
The sniper will not be able to place bids and access your Watch List until you do it.