In the past couples of weeks, the error code weasal was appearing often on my computer. I deplugged the ethernet capable related to my booster that increase my signal' strenght and the error vanished. it was ok for like 1/2 weeks and now, all of a sudden, I started getting the error code again. Even thought my wifi is fine, I keep getting this stupid error code. I must say that when I play other games, I don't have a wifi problem, so it is only in Destiny that this problem arises.
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Performance in other games is irrelevant when troubleshooting your network connection issues for Destiny 2. https://help.bungie.net/hc/en-us/articles/360049496531-Network-Troubleshooting-Guide