I cannot open the multi currency?

Let's resolve the error you're encountering when opening multicurrency, Sienna.

The error you're having can be caused by your browser. Clearing your browser's cache and cookies can improve performance by removing temporary files that may be causing errors. 

Sign in to your QuickBooks Online (QBO) account using a private browser. This method doesn't store data in the cache, which can help isolate the issue.

Here are the shortcut keys for opening an incognito or private window in different web browsers:

Google Chrome and Microsoft Edge: 

• Windows/Linux: Press Ctrl + Shift + N
• macOS: Press Command + Shift + N

Mozilla Firefox:

• Windows/Linux: Press Ctrl + Shift + P
• macOS: Press Command + Shift + P

Safari: Press Command + Shift + N

If it works, here's how to clear cache and cookies to fix issues when using QuickBooks Online. Refresh any open web pages for the changes to take effect.

Additionally, please ensure that you have the latest browser update installed and that your computer meets the minimum system requirements recommended for QuickBooks Online.

For more information about turning on multicurrency and processing transactions, check out this article: Set up and use Multicurrency in QuickBooks Online. 

I'm always here if you need more help opening your multicurrency in QuickBooks Online. Have a great rest of the day!