The first thing to check is whether or not your Blackboard login credentials work in a web browser on a non-mobile device. In general, if you can login to our Blackboard site (https://bblearn.atu.edu/) using a web browser, then those exact same credentials should work on the Blackboard app. If you cannot login there, there may be an issue with your password, so you will need to contact the Campus Support Center at campussupport@atu.edu or open a ticket with us at https://ois.atu.edu.