I'm sorry that's not really helpful and not really working right it doesn't seem. I go to Transactions->App Transactions and I see apps for amazon business, ebay, shopify, amazon seller central, and square, no PayPal (I would guess because it's already connected).
I go under 'Apps->Overview' and I see the connect to PayPal app as the only one listed. If I click 'launch' it says 'We're sorry, we can't find the page you requested.' If I just select the app it says 'Your app is connected. If your app has any connection issues, we'll let you know.' If I click the dropdown and go to settings it just takes me to my bank transactions page which is where I am having the issue.
None of the above seems to help or give me any indication of why the issue is happening or how to fix it. I have also not changed any of this for a long time so this is something new on your side that is causing an issue.
