SU-BI-CA Error

Actually. I think I kinda found the problem of what’s causing my epic games launcher and roblox studio not connecting to my internet. I think it has something to do with the dns cache issue. But I kept following the video tutorial of how to clear the dns cache. But nothing is working with it at all. I also had restart the router internet by unplugging it for like 1 minute. And when I plugged back in. nothing still worked. So I got no other ideas to fix of this connection issue to some of my apps like roblox, GitHub, and epic games launcher at all. I give up. By the way I had to use an vpn called fiddler to install the epic launcher back. Which it work. But it slow down alot of my internet. So I had deleted it. But I got epic launcher installed back tho. But still no connection at all what so ever. So I give up. And it’s been like 2 weeks ago since from the first day of November it happened