I have some helpful steps to troubleshoot the error and get you back to using QuickBooks Online smoothly, Stephan.
Error 30006 happen commonly due to connectivity issues. To resolve it, make sure your internet connection is stable, firewall settings are configured correctly, and Intuit servers are reachable.
If the issue persists, consider using a different supported browser. This can help determine if the current one is corrupted or outdated.
Feel free to explore the solutions outlined in this article to assist you in troubleshooting network issues: What to do when a network issue error has occurred. The article is from the US region, but it also applies to the global version.
For tips on how to get the best online experience, open each link below for the full details:
Drop a comment below if you have other product-related concerns or need further assistance navigating around QBO. We're always ready to lend a helping hand.
