Hi there. This can sometimes indicate an issue with your HDD. I recommend [url=https://www.bungie.net/en/Help/Article/12539]clearing your console cache[/url] to see if that helps. If it doesn't, you may want to uninstall the game, [url=https://www.bungie.net/en/Help/Article/12539]clear your console cache[/url], then reinstall the game.
As a last resort, you may want to contact [url=https://support.xbox.com/]Xbox Support[/url] to see if they can offer assistance with that error message.
Tried all the above and it's still happening........... I can't see Xbox support being interested as, as I said, it only happens in one area of Destiny 2 and always at the same points in time, namely ravager spawns! But thanks for the reply anyhow.