Hello there, Thank you very much for reaching out to us. I'm sorry to hear that you are receiving these error messages when running a mission. The [url=https://help.bungie.net/hc/en-us/articles/360049201971-Error-Code-GUITAR]guitar error code[/url] is generally associated with too many items in the game remaining on the ground. We'd recommend going through the help article for some additional information. If this was from a fresh instance and you hadn't done anything yet, can you provide us with a short video demonstrating the issue? You can upload it to one of the media-sharing websites listed below: - [url=http://www.youtube.com]YouTube[/url] - [url=http://www.x.com]X/Twitter[/url] - [url=http://www.imgur.com]IMGUR[/url]