Anyone here who's Training Tab is not working? like it does not stop loading and most courses don't appear.

It's nice to see you here in the Community, @lorezcomareyjoya. I'm here to help you make this work and to show courses in QuickBooks Online (QBO).

You may experience browser-related problems resulting in a greyed-out when accessing courses. The system sometimes behaves strangely when the browser is full of outdated pages. The cache stored in your browser may be causing the issue. I suggest performing some basic troubleshooting steps to isolate the issue.

Let's begin by signing into your account using a private window. Here are the keyboard shortcuts depending on your browser:

• Google Chrome: press Ctrl + Shift + N 
• Mozilla Firefox: press Ctrl + Shift + P
• Safari: press Command + Shift + N

If this works, you'll need to return to your default browser and clear the cache. If not, try another supported browser.

Here are a couple of articles that guide the QuickBooks ProAdvisor program and certification process:

• Sign Up for ProAdvisor And QuickBooks Certification Courses
• QuickBooks ProAdvisor Program Member Guide For Brand Use

Please let me know if you have any other questions as you start taking the ProAdvisor training and certification, @lorezcomareyjoya. I'd be happy to make sure you have all the resources and information needed to complete it.