There could be 3 possible reasons:
You can always recover your pasword in just 3 steps:
You may need to check these two things:
You can enjoy the flexibility of choice in online payment via OCS using:
Please ensure that you have disabled your pop-up blockers. The Mobile Connect login page loads in a pop-up screen.
To disable pop-up blocker for Chrome browser, launch Settings > Site Settings > Advanced Section > Slide the “Pop-ups” button to the off position.
To disable pop-up blocker for Safari (iOS) browser, launch Settings > Safari > Slide the “Block Pop-ups” button to the off position.
For other device models, please refer to the manufacturer or OS settings.