I am trying to create provisioning profile by clicking "Fix Issue" in Target -> General -> Identity settings. It shows me popup "No Devices Registered", so it seems like I need to have a device to create a provisioning profile. Is there any workaround? I just need to archive my app and upload it to iTunes for TestFlight testing, so the devices might come from other testers ultimately (internal or external ones), but I currently do not have an iPhone with me.
To Register device and use it with iTunes and TestFlight you have to create apple developer account. After creating account just follow this tutorial to setup certificate and provisioning profile, which are requires to accomplish your task.