Hello there, Thank you very much for reaching out to us. I'm sorry to hear that you are having issues playing the game on the Xbox App on PC. These two error codes generally come from connectivity issues. We've taken note of this thread and will continue monitoring and underlying issues that may be occurring. For any updates that may come from this report, we recommend viewing our Patch Notes as they become available, posted on the [url=https://www.bungie.net/7/en/News]News page[/url]. In the meantime, while this doesn't seem to occur when using Epic Games, we'd still recommend going through our [url=https://help.bungie.net/hc/en-us/articles/360049496531-Network-Troubleshooting-Guide]Basic Network Troubleshooting[/url] and [url=https://help.bungie.net/hc/en-us/articles/360049496751-Advanced-Troubleshooting-UPnP-Port-Forwarding-and-NAT-Types]Advanced Network Troubleshooting Guides[/url]. We'd also recommend checking out the Help Articles for both of the error codes received: [url=https://help.bungie.net/hc/en-us/articles/360049195771-Error-Code-FLY]- FLY[/url] [url=https://help.bungie.net/hc/en-us/articles/360048717852-Error-Code-WEASEL]- Weasel[/url]