Hello Nilufar,
OTRS 5 was just the base of the first version of KIX17.
The further development of KIX17 is independent from the OTRS framework.
The framework version of KIX17 is 17.x.x. That's why you get errors when you try to install OTRS packages.
To install your packages you would have to adjust their framework version. But due to the indepenency of the developments it is not sure that those packages work as intended in KIX17.
Best regards
Richard