Problem installing a third-party app

I have a third-party app installed on my iPhone 16 Pro Max, and since yesterday I've been getting the following error: "An internet connection is required to verify developer trust. Apple Development: Created via API (3GJ3LH6NRW). This app will not be available until it has been verified." Can you help me fix this? I've been told it should work again on its own in 2 to 4 days. I have a Developer account to sign apps and avoid problems; it's never given me any trouble until now.

Problem installing a third-party app
 
 
Q