Hi there,
I know how important it is to be able to use your QuickBooks Online account without having to log out and back in when you get an error message. I'm familiar with the "JSON at position 0" error message, and I'd be happy to help you get this fixed. Follow the simple browser troubleshooting steps listed below to get back on track.
1. Clear the cache and cookies in your web browser. These are stored Internet files that build up over time. They cling to the back-end of your browser, and they can cause bugs and errors in QuickBooks Online and other sites. Here's how to do that: How do I clear my browser cache and temporary Internet files?
2. Use Incognito Mode in Google Chrome. This is a private window that runs independently from the rest of your browser. This is often used to diagnose browser-related issues. Here's more information about what that is and how to use it: Browse in private.
3. Try using an alternative browser all together.
This should get things sorted out for you. If you're still seeing this error message, please reach out to our tech support team so we can take a closer look at what may be happening.
Cheers.