I am also having the same issue, i am on a windows 10 pc have tried firefox, edge, chrome and also my mobile but cannot log into my mobile account. Have cleared all recent history but still cannot log into my account.
The app is working fine, when trying to log in after putting email & password & clicking on Capture i get the following message.
We’re sorry that you are unable to log in to Your Account at the moment.
If you have recently ordered a new Virgin Mobile phone or SIM and were super eager to get going, it might be that we are still verifying your details. This should be resolved soon, so please try again shortly.
However, if the issue persists or you’ve been registered for a while, please give us a call on 0345 6000 789* for more information.
*Please note standard charges apply. Please check with your network operator for rates.