Terminal auto closing after execution and numpy has no attrubute 'int'

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Hello,

I am using this (great) script for research purposes, but i encountered some issues.

-When executed, after installation and setup, the script opens a terminal, that shut downs automatically, where as in the example, it shows the result right below the command. How could I reproduce that please?

-I successfully generated my key pair, but when I try to use them for data encryption, I get the following error : "AttributeError: module 'numpy' has no attribute 'int'. Did you mean 'inf'? in numpy_init_.py, line 284, in getattr .

Thank you for your help.