This is already under investigation, JHAmll.
Some users are getting the Error 504 when logging in to their accounts. Our engineers are working for a permanent fix.
We'll let you know once it's resolved. You can also check this link for any updates.
Feel free to let us know if there's anything else we can do for you. We're around to help you.
Hi there, taylorbbco.
We are aware of this issue where customers are getting error 504 and Error 502 (Bad Gateway) when logging in to their QuickBooks Online account. Our engineers are currently working to fix it as soon as possible.
Thank you for your patience as we work through this. You can also follow this link to subscribe for the updates: http://status.quickbooks.intuit.com/incidents/gth329fb8w4z.
Thanks for joining the discussion and subscribing for updates, @tonyabullard,
The 504 (Bad Gateway) error when singing into QuickBooks Online account is something our engineers are working at the moment. They are continuously monitoring this outage to come up with a fix and get your account back to working order.
We recognize the urgency to resolve this as quickly as possible. To be updated with the status of this service interruption, visit this link: http://status.quickbooks.intuit.com/
If there's anything else you need help with, let me know in the comments. I'm here to lend you hand at any time. All the best!
I'm here bringing the latest update. The error 502 (Bad Gateway) is now resolved. You can now access your account without any error.
You'll see the status of the issue in this link: http://status.quickbooks.intuit.com/incidents/gth329fb8w4z
If you have more questions, please let us know. We are here to help.
I'm pleased to inform you that the Error 504 (Bad Gateway) when attempting to log into QuickBooks Online has been resolved.
To resume with your business processes, clear your browser's cache then try signing in again.
The Community has your back when you need additional assistance with our program. Feel free to drop by and add your comments any time. I'm also here to assist you. Have a wonderful week ahead!