Hi Lindsay396,
 
It's vital you're able to sync your QuickBooks Time to your QuickBooks Online account and I'll be glad to point you in the right direction. QuickBooks Online is a hassle-free program that's great for business owners looking to streamline their work. 
 
Based on the details you've provided it sounds as though you're already on the right track. I highly encourage you to reference the steps in this article here to make sure you're able to connect the two programs together. If you're still getting the same error, I suggest trying the steps using a private/incognito window. 
 
Try this out and let me know how you make out. I'll be one message way in case you need additional assistance. Otherwise, I wish you a great rest of the week!