Apps page does not work, says you don't have access to this page.

Hi there, nicole-beechler-.

Welcome to the QuickBooks Community. I'll ensure to provide some information about the user access in QuickBooks Online. Then, make sure that you're able to operate the Apps center.

The admin can manage roles and limit access to specific tasks when adding a user to QuickBooks Online (QBO). Also, they can choose what users can see and do within the different QuickBooks areas, like customers and sales or vendors and purchases. Thus, it might be the admin is set you as a user that has limited access to the QuickBooks system. That's why the Apps page doesn't work for you. 

I suggest asking your Master or Company admin to grant you all access rights so you'll be able to navigate the Apps page.

For additional reference, you can check this article to see the different options for user roles and access permissions: User roles and access rights in QuickBooks Online.

I'm also adding this article to further guide you in effectively managing your business using QBO: Help guide for QuickBooks Online. It contains topics about advanced accounting, banking, and payments to name a few.

Feel free to leave a comment below if you have additional questions about user access or accessing the Apps center. I'll be around to help you out.