The best method for handling non-responsive buttons is to clear the cache of the browser you're using for QuickBooks Online (QBO).
Web-based platforms like QBO collect cache files (cookies) to save you time when loading repetitive data and images. These files can often become outdated or corrupted, causing issues like the one with your non-responsive Export button. Clearing them out usually resolves these issues, and here's how you can accomplish this in all supported browsers:
By doing this, you'll force QBO to load a fresh copy of the un-responsive button. Please reach out to me here and let me know if this gets things rolling again, I want to ensure your success. Thanks for bringing us your question, I'll be watching for your reply.