Tried installing the JB with impactor on iPad 6th gen on iOS 12.1.1. Impactor loaded unc0ver fine. The one mistake I know I did was that I forgot to remove the OTA update that was downloaded and being stored in Settings> General > iPad Storage. After I realized the mistake, I went back and deleted the OTA download. Tried the JB again and I keep getting this error after multiple tries. Each time I try I get the same error. I.ve tried installing both unc0ver 37 and 38. Any suggestions on how to fix?