If you‘re experiencing a blank screen when trying to chat with support in your QBO browser, here are a few troubleshooting steps to check for browser issues first. 

You can start by pulling up your QuickBooks Online (QBO) account using a private browser (incognito). Here's how:

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

Once signed in, go to the Help menu to contact support via chat. If you're able to connect, return to your default browser and clear your cache. This will refresh the system and remove older data that causes viewing and performances issue. However, if this matter continues, I'd recommend using other supported browsers.