Sync to phppointofsale system

Hi, @rooz999! I've got some steps you can perform to isolate the issue.

First, let's try opening your account through an incognito window to rule out the possibility of a webpage issue. Refer to these shortcut keys to open an incognito window in all supported browsers:

• Chrome: Ctrl+Shift+N
• Firefox: Ctrl+Shift+P
• Safari: Command+Shift+N

Once logged in, try connecting the app again. If it works, you may have accumulated too much historical data. I recommend clearing your browser's cache to access QuickBooks with a clean slate. You can also use a different supported browser.

If you're still getting the same error message, contact our Intuit Developer Team for further help. You can submit a case using the instructions below:

1. Go to this link: https://help.developer.intuit.com/s/.
2. Scroll down until you see "Can't find what you're looking for."
3. Click the Contact Support blue button.
   
   
4. Create a case by selecting a product and category first. Then, Next.
5. Follow the onscreen instructions. 

I'll be right here if you need a hand with anything concerning QuickBooks. Have a great day, @rooz999!