If your log in button does seems to do 'nothing' when pressed this is typically a Proxy Issue.

Allowing the client to access the '*.blippit.io' and 'blippit.co.uk' addresses 'DIRECT' should resolve this issue. The client will still access some of our CDN resources via the existing proxy if required, as long as the proxy directive for anything on the '*.blippit.io' and 'blippit.co.uk' domain(s) is 'DIRECT' and your firewall allows access to our originally listed IP addresses on TCP port 443