We are having the same issue. On IPad weare not able to access apps in Safari or Chrome, but can access the hub. On Mac we can access the hub on Chrome and Safari, but can only access the apps on Chrome, Safari just thinks about it. On a windows macine we can access the hub on IE and Chrome and access the apps.
Please, check the HTTP box on QMC > Proxy Service > Service listen port HTTPS (default).
The IOS devices doesn´t allow access to invalid https certificates.
The another solution is configure the valid certificate.