i may have found the solution to this problem at least it worked for me So what you're gonna wanna do is go to ur settings in windows, then go to "system", then you're going to go to "recovery", then reinstall ur current version of windows with all your (apps, files and settings being preserved) follow the steps from there let it reset ur pc or do it yourself once its done updating/downloading then try launching d2 once its done that should be it hope it works for you

I have the exact same issue brother. There is a YouTube video from a guy that shows the problem. https://youtu.be/FYUwAAW1QMc?si=3w9POTEaL5EUoCxN For Bungie Support! I have tested multiple networks and router configurations to rule out local connection issues. The disconnect happens on a wired Ethernet connection at home, on my phone hotspot, and also while connected to my neighbor’s Wi-Fi (same behavior each time: Destiny 2 loads in, then disconnects shortly after with error code WEASEL). On the router side (FRITZ!Box), ive tried enabling device-controlled port sharing and also set up manual port forwarding for Destiny 2 (UDP 3074 and UDP 3097), but this did not change the issue. Also try changing DNS to Cloudflare and Google. On the PC/Steam side, we cleared the Steam download cache, verified/validated the Destiny 2 game files, and reinstalled/repaired BattlEye. Windows Firewall access for Destiny 2 is allowed (private and public profiles). The problem persists across all tested networks. I know you network troubleguide says it’s because of the user network but I can say it’s not related to a normal network behaviour!