I was having the same issue but now it's working fine for me again, no idea why so I have no idea what is going on.
I unplugged my Ethernet and plugged it back in but I don't think that was what fixed it. if resetting your router didn't work for you.

Only other thing I did prior to that is it reset the system settings in the launcher config settings I don't know if that is what fixed it or not.
I'm sorry I can't be more helpful.