Does anyone know how I can get my clients back after my laptop did an update?

what kind of update? Windows update?

I can share a few tricks to help you isolate this issue, @info1693.

You'll want to log out and log in back to your QuickBooks Online (QBO) account to refresh the connection. If the issue persists, I suggest accessing your QBO in a private or incognito window. 

This way, we can rule out a possibility of a web browser issue. The system utilizes cache data to help load web pages faster on your next visit. When this gets pilled up, it causes issues that affect the performance of your account.

Using a private window helps us verify the issue as this doesn't save any cache data. To open an incognito window, you can refer to these keyboard shortcuts keys depending on the browser you're using:

• Ctrl + Shift + N for Google Chrome browser
• Ctrl + Shift + P for Mozilla Firefox & Microsoft Edge browsers
• Command + Shift + N for Safari browser

If you’re able to view your clients, I propose clearing your regular browser's cache to start with a clean slate. If the issue remains, I recommend using other supported browsers. This way, we can check if this is a browser-integrated issue.

Once everything is all set, you can now invoice your clients and record their payment whenever you're ready.

Do you need more help supervising your clients and QBO account? If so, you can always tag me in your reply. I'll be here to assist you anytime. Keep safe and have a great day ahead!