Relaunch the tool and try the installation again. The software should now ping the server, see that your ECID is "Authorized," and proceed. Important Warnings
If your device's ECID is not registered, you may need to contact Apple Support for assistance. Here are the steps to follow: ecid not registered install
When you deploy custom recovery tools, Ramdisks, or specialized modification tools like iBoy Ramdisk or Broque Ramdisk , the desktop software queries your device's ECID. The software cross-references this string with its central database server. The software triggers the registration block for two primary reasons: Relaunch the tool and try the installation again