This is not the experience we want you to have while turning on Multicurrency in QuickBooks Online (QBO). Allow me to provide some other steps to help you out.
Let's check if it's a browser-related issue. We can start by opening your account in a private web browser as it ignores historical data. These are the keyboard shortcuts:
If you're able to turn on Multicurrency, then it's safe to say that it's being caused by your browser. You'll want to clear your regular browser's cache so the system can start fresh.
Furthermore, you may check out this article if you want to customize your rates for one or more transactions in the future: Enter and use your exchange rates in QuickBooks Online.
Should you have further assistance regarding Multicurrency or any QuickBooks-related concerns, you can drop a comment below. We're here to lend a hand. Keep safe.
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