I've been using billpay through the app just fine until last night. Now when I try to use I get the following; could not be loaded because: net::ERR_BLOCKED_BY_RESPONSE

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

Hello there, @sayphonh.

I can help you pass the sign-in page to pay bills online. Thus, I suggest you perform browser troubleshooting steps. Doing so will eliminate common errors occurring on your company file. Also, you'll want to double-check if your internet connection is connected.

Afterward, let's launch the website in a private or incognito browser. You won't save browsing history in this mode, which also aids in isolating any website problems.

Here are the keyboard shortcuts:

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

Once done, let's clear the browser's cache. It's also best to use supported browsers to have the most secure experience with QuickBooks. Then, log in back your account and proceed with paying bills online.

In addition, you can check out this article for more details about fixing sign-in errors in QuickBooks Online.

Once sorted out by logging in to your QBO, feel free to visit these articles to categorize your transactions. That way, they'll be adding them to the correct account. Afterward, you can proceed with reconciling your account in QuickBooks Online.

• Categorize and match online bank transactions in QuickBooks Online
• Reconcile an account in QuickBooks Online

You can always drop by if you have more questions about signing in to your account. Just add a reply to post them here. Stay safe!

Tried that before too before posting here.  Doesnt work either.

@sayphonh 

Signup for a separate Melio account for free and integrate it with QBO. Do you encounter the same problem?

https://melio.grsm.io/quickbooks

Hello there, @sayphonh.

Thank you for coming back to the QuickBooks Community. I also appreciate you performing the troubleshooting steps to fix your issue when using bill pay.

Since the steps didn't work and the issue persists, I suggest contacting our QuickBooks Support Team. They have the tools to check the root cause of this issue and might raise an investigation.

To reach them, click the ? Help button at the top-right corner of your QBO account and select Contact Us to talk with a live agent. Ensure to review their support hours to know when agents are available.

For future reference, you might want to visit these great resources to learn more about how QBO works:

• Video tutorials for QuickBooks Online 
• Webinars
• Help Articles

Drop a comment below if you have other questions about QuickBooks. I'll be happy to help you further.