Hello, For whatever reason when i use ANY linking program on ANY computer i cannot send apps (.8xk files) to my ti 84 plus, any ideas on how to fix this issue (im running ti os 2.43 on my ti 84)

EDIT: it fails during verification, and the app was DoorsCS7 (off of ticalc), also i have tried resetting the calculator and trying to create a new certificate

EDIT 2: error was "invalid packet"