Problem on lauching AsterStudy

Dear alls,

When I lauch AsterStudy, I get an error, and the terminal indicates:

File "/home/jacques/installation_directory/salome/V2020.0.1_universal_universal/prerequisites/Python-365/lib/python3.6/ctypes/__init__.py", line 7, in <module>
    from _ctypes import Union, Structure, Array
ImportError: libffi.so.6: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce type

It seems that libffi.so.6 is not found, but I have found it in another folder :

/snap/core18/1988/usr/lib/x86_64-linux-gnu/libffi.so.6

I have copy this file in tha main folder of salome

/home/jacques/installation_directory/salome/V2020.0.1_universal_universal/modules/ASTERSTUDY_20200/lib/python3.6/

but the message is always the same; do you have an idea?

Perhaps '/home/jacques/installation_directory/salome/V2020.0.1_universal_universal/modules/ASTERSTUDY_20200/lib/python3.6/' is not in $LD_LIBRARY_PATH. You need to put libffi.so.6 somewhere which is included in $LD_LIBRARY_PATH

Thank you yongjin for your answer; I have copy libfii.so.6 into

/home/jacques/installation_directory/salome/V2020.0.1_universal_universal/prerequisites/Python-365/lib/python3.6/ctypes/

but the result is the same; I have the same error :

File "/home/jacques/installation/V2020.0.1_universal_universal/prerequisites/Python-365/lib/python3.6/ctypes/__init__.py", line 7, in <module>
    from _ctypes import Union, Structure, Array
ImportError: libffi.so.6: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce type

Perhaps it is possible to add a new path for the Library but I do not know how to proceed....

Best regards