Every time I try to use the update by adb option in recovery mode it reboots my phone

[Octillion]

How can I fix this issue :crying:

 

[Octillion]

Oh also I noticed that before rebooting there is a message that says: *Stopping adb*

 

[GokberkTunc]

It happened to me also. Just find a micro sd card and get away from this Samsung weirdo things.

 

[IRQ3]

I have the same issue
Also When i update from sd card
It says to me:
Footer is wrong
signature verification failed
Error 21

I have flashed the INS firmeware
I have downloaded the update zip file more then 3 times but same result