Hi @Steph Lee , Thank you for your post. If you are unable to scan the code, you may try manually adding a work and student account(non-microsoft) to the app by following the instructions here: https://learn.microsoft.com/en-us/azure/active-directory/user-help/user-help-auth-app-add-account-manual
If the issue persists, we recommend you to reach support through Contact - Microsoft Support
If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.
Please remember to "Accept Answer" if any answer/reply helped, so that others in the community facing similar issues can easily find the solution.