Hi there, @Soumya Goyal.

Welcome, and thanks for posting here in the Community. I can help fix the issue you're having with QuickBooks Online (QBO).

The error may be caused by an interrupted connection with our server. We'll perform a few steps to resolve this.

Let's begin with logging into your account through a private browser (incognito). It's the best place to isolate connectivity issues.

Here's how:

• Press Ctrl + Shift + N (Google Chrome).
• Ctrl + Shift + P (Firefox).
• Control + Option + P (Safari).

If it's successful, return to your default browser and perform a clear cache to refresh the system. However, if the issue persists, try using other supported browsers.

You can also visit our website for more tips and other resources you can use in the future: Self-help articles.

Please let me know in the comment section below if you have more questions about this or anything else. I'm always here to help. Stay safe.