For proper debugging (and searching this forum), you’ll need to get to know the proper terminology (geheimtipp: hover your mouse over an icon to see its name) and be explicit about where you see things. What you’re seeing is either the OTAA Join Request (the yellow/orange icon if seen in the gateway’s Traffic page) or the OTAA Activation (same icon, if seen in the application/device’s Data page). And I assume that for “not confirmed” you mean you don’t see a green icon for the OTAA Join Accept? (If shown, then that’s only shown in the gateway’s Traffic page.)
See some debugging steps in OTAA activation fails - is this caused by distance?, Can I use TTN without my own gateway if one is nearby? and OTAA no Join Accept after changing batteries.