Failed Import Package

Hi, I want to open unity, my project and then import a package that i have stored in my system .
so I am using this command:

unity.exe -batchmode -projectPath "D:\MyProject\TwoPunchMan" -importPackage "C:\Users\Santy\Downloads\testing\LeanTouch"

it gives error : Failed importing package. It happens with every package.

I tried without using -batchmode. I get same error in console.

I will run this command at jenkins which will import a package at my project and will trigger build.
I wonder what will happen if there are some scripts that are already available in my project . Will it replace all things by itself or prompt a gui to choose?

Using unity 2019.4.7f1.
Please guide me how to do it?