Default [Q] Getting a strange error when trying to flash stock

Hello first of all, thank you for looking i hope you can help me. I am trying to UN-Root my phone, because i am giving it to my wife and she hates it being rooted. but i get this error everytime i try. so please help

and if you have any questions from me please do ask, i will try to answer as much as i can


PS: I attached the screen shot of my desktop
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Samsung E4GT
[ ROM ] Calkulin's E4GT 2 v1.3a