Qualys gives the site an A, but says of some browsers: "Server negotiated HTTP/2 with blacklisted suite" so I imagine this is the cause of the problems?
https://www.ssllabs.com/ssltest/analyze.html?d=www.webstack....
Edit: This was with FF48 on Linux. Restarted Firefox to get v49 and it's working now.
Qualys gives the site an A, but says of some browsers: "Server negotiated HTTP/2 with blacklisted suite" so I imagine this is the cause of the problems?
https://www.ssllabs.com/ssltest/analyze.html?d=www.webstack....
Edit: This was with FF48 on Linux. Restarted Firefox to get v49 and it's working now.