Ted here from Shopify, thanks for reaching out to us!
I'm just after checking your store and I can confirm that it's up and running as it should be. Regarding the error you are seeing, it sounds as though you're trying to access an old account by mistake. Could you try accessing your account using the same email address you use to sign in to your Shopify Community Forums account with this link instead? Are you able to log in this way? If not, please let me know!
If there is anything else I can help you with, I'm happy to help!
Thanks a mill,
Thanks for letting me know. I'm just after sending you an email with some more information. Could you take a look at my reply and follow those steps? After that, please let me know if you are still no longer sign into the account and I'll take another look!