If you have been trying to sign into Facebook Messenger on your Windows Phone device and are getting a "602 error" message instead, you are definitely not alone. A large number of users are getting the same problem across multiple Windows Phones.
The problems began late on Wednesday and it appears to be a global issue, according to comments on our Windows Central forums and also on Twitter. There's no word on what might be causing the "602 error" and the Facebook Messenger app itself has not received an update in a little while. If you are experiencing this problem on your Windows Phone, there is a workaround of sorts; you can go to the m.facebook.com URL in your favorite browser and check out your messages there. In the meantime, we will keep an eye out to see if this log-in problem with the app will be fixed soon.
Thanks to our Windows Central forum members for the tips!