TLS v1.0 was discontinued in this client version. I am curious... what version of View are you using on the server? The reason I'm asking is that mine is an older version, and I'm seeing the issue.
The latest Horizon Clients have turned off support for TLS 1.0, an older encryption framework with multiple security vulnerabilities. If your company is on an older version of the server software, for instance Horizon View 5.X, it won’t support the newer encryption connections. There is a work-around for mobile clients that I have been sharing with companies when they reach out to me. Otherwise, you can stay on the Horizon Clients 4.9 until you can update your environment.
Product Line Manager