Hello @Marykward,
Thank you for reaching out to us on the Community Forums! Not being able to access your myAT&T account can be quite concerning. I will be more than happy to assist you with this!
To rule out a few things, please try clearing your browsers cache & cookies. Trying a different browser may help as well.
Another issue is some countries block access to certain websites. This could be the main cause not allowing you to access your account while roaming.
To confirm it is not an account issue, I will be reaching out to you via private message. Please check your Forum’s Inbox for this.
I look forward to getting this resolved. Have a great day!
Jonathan, AT&T Community Specialist