Hello Logan,
Thank you for your question about these snipes. eBay doesn't always give the best error messages, but in this case it looks like they sent you some kind of security warning recently, and it expired your authorization.
If you haven't already, (it looks like you have), just go to Preferences and click the blue "Log in With eBay" Button. It will walk you through authorization and you should be good to go.
Thank you for taking the time to write in. If I can help further, please let me know.
bidslammer