NO! This answer still hasn't solved my problem. I encountered the same issue with the prompt "Error while fetching extensions. Failed to fetch", but it's really a computer problem. I turned on VPN once while running vsCode normally, and since then my vsCode has been like this. I couldn't find any extensions. I tried uninstalling and deleting the configuration folder, which made the situation worse. I even cleared all the extensions I had before! I have also tried changing the system's proxy files, resetting the network in computer settings, and turning on and off VPN again, but none of these have worked. Oh my god, what should I do? Do I have to reinstall the system!?T_T