Thank you for joining this thread, WU_Sadra.
When connecting PayPal with QuickBooks Online, make sure that no other user has already connected it. Verify that you have primary or company admin privileges in QuickBooks Online (as only admins or accountants can link the app), and ensure that the PayPal credentials belong to a PayPal admin user, not just an authorized user.
If the issue persists, I recommend contacting our customer support team . They have the tools to review your account and identify the root cause of this issue.
Here's how:
Please let me know if you require any further assistance regarding your PayPal in QuickBooks Online. I'm always here to help.