Macmillan Education eReader

I know that this app is really useful by seeing those images uploaded on the bottom part of the app. But if I give all my details and login, it's not working at all. The login button is not at all working.And I have also tried uninstalling and re-installing this app many times. Please fix this situation as soon as possible.

I don't know how the application works as I wasn't even able to log in. I was able to create a new account but when I entered my username and passwords and pressed the log in button, nothing happened. When I pressed the button, literally nothing happened. At first I thought that maybe it was loading but when I clicked on the username option I was still able to type the username which meant that nothing had happend. I tried the whole process several times but still, it was useless.

After installing the app a few days it was working properly afterwards it is not opening at all. It is just loading and loading. It doesn't matter how many times I uninstalled and installed it it had same response. My exams are coming near. I need some answer in Hindi Surya Kiran class eight book. Now I need answer urgently now what shall I do?