Hi Lasha,
Thanks for taking the time to post about your issues in the Community. ⭐
We're sorry to hear you've been having issues when signing in to the O2 Priority app.
So we can help further, can you come back and let me know the following:
➡ Which handset are you using? (Make and Model)
➡ Which app version are you using?
➡ Which OS version have you installed?
➡ What browser/default browser are you using?
➡ Do you have an active VPN, or security such as Norton/McAfee?
➡ Is the device rooted?
➡ Can you document the steps which led to the error?
Pop back and we can give you some steps on how to resolve the log in issue.
Many thanks,