Disabling 2FA or failing to use an app-specific password can cause the authentication request to fail. Common Solutions
If you install or Mojave (10.14) inside a virtual machine (VMware/VirtualBox) and install an unpatched version of iTunes 12.6.4, and you use an Apple ID that has never enabled 2FA (created before 2015), you might get Cydia Impactor to work. assert code 200 cydia impactor exclusive
Tonight was personal. A client had paid him in Bitcoin Cash to sideload a tweak onto an iPhone 5 running iOS 10.3.4—a fossil of a device that refused to talk to any modern signing service. The catch? Apple’s authentication servers had recently tightened their OAuth flow, breaking every free developer certificate workflow. Disabling 2FA or failing to use an app-specific