Hi Lucia, thanks for reaching out to the QuickBooks Community
Since we don't have any similar reports of this at the moment, please check for any browser-related issues that may be causing this by clearing the cache and Intuit-specific cookies on your normal web browser or alternatively, try accessing QuickBooks through a different web browser.
If you continue to experience performance issues when selecting classes, please get back in touch below so our team can investigate further. Thank you!
