If I open a second window qb online ask again for my locon detal and the have to click again on the + Then error apear "Quicbooks Error, oops Quickbooks

A warm welcome to the Community, oosthuizengysber.

When a browser stored a lot of caches, it could cause problems like not being able to open a second window or latency issue. As an initial step, you can press the F5 key on your keyboard to refresh the page.

If you're still unable to open a new window, let's log into your QuickBooks Online account using an incognito portal. It's a great way to isolate browser-related issues since it doesn't store data in the cache. Here are the keyboard shortcuts: 

• Google Chrome: CTRL + Shift + N
• Safari: Command + Shift + N 
• Mozilla Firefox or Microsoft Edge: CTRL + Shift + P

Once signed in, open a second window from there. If the private browser works, you can clear the cache depending on which browser you're using through this helpful article: Clear cache and cookies to fix issues when using QuickBooks Online.

You can always visit our Help Articles if you have other questions about QuickBooks Online. This will provide you links and related resources to help you with your future task.

If there's anything else that I can help you with, please let me know. I'll be happy to assist you further. Wishing you the best.