I've tried adding firstname.lastname@example.org
to my address book, no luck.
If it helps, I'm using Google Chrome as a browser, I have the adblock plugin but I've disabled it on soundcloud.
The domain used for my email is Outlook.com.
I'm running 64-bit windows 10 and created my account only a couple days prior to this post.
Thank you for reading, if you think there's any more information I could provide feel free to ask.