Can't Connect To Server (Horizon)

I have uninstalled / reinstalled Horizon and each time it says “Failed to connect to the server” and then starts in offline mode.

It was working just fine last weekend, any information on how to bypass this?

I have same thing happening to me, I’ve tried everything including disabling firewall and anti virus and its still not letting me use. I’m afraid it might be a scam since none of the advice they give works.

Lol. That "scam " has bin used for the last what 10 years
Usually thats what it is , is firewall or antivirus