I have been trying to do the PayPal Connector for my 3 PayPal accounts for a month, and I get the 504 error where it can't complete/connect to PayPal. How do we fix this?

I get how important it is to integrate your PayPal with QuickBooks as soon as possible, hollypixels.

I recommend reaching out to our Live Support team. They can pinpoint what’s causing the 504 error and guide you through the steps to resolve it. Here's how:
 

1. Click on the Help icon in the top-right corner of your QuickBooks.
2. Go to the Search tab, and select the Contact Us button.
3. Type your concern in the box and hit Continue.
4. Choose a way to connect with us.
    

Please take note of their support hours so you can reach out to them at your convenience.
 

We are committed to helping you in any way we can. Let us know by leaving a comment below if there's anything you need.

@hollypixels 

Try opening your QBO account on any private/incognito browser.