App not available
A testing version of this app hasn’t been published yet or isn’t available for this account.
If you’ve been invited to become a tester, make sure you’re signed in to the account that was invited to the testing program. If you’ve been invited to a Google Group or Google+ Community as part of the program, make sure you’ve joined the Group or Community.
Despite your remarks that in case the app is not available the login address does not match, i have only one address and are not able to install the test app.