Problem of usage of sen2cor in singularity image

I am trying to process sentinel-2 images with sen2cor installed in singularity image (SI). As an OS of SI I am using ubuntu20.04. First of all, while the installing of sen2cor, I got a lot of strange error messages: find: 'file': No such file or directory. But after all, installation is successful. But when I try to check the efficiency, launching L2A_Process --help, I got an error: /Sen2Cor-02.08.00-Linux64/bin/L2A_Process: 5: /Sen2Cor-02.08.00-Linux64/bin/python2.7: not found. But when I check the Sen2Cor-02.08.00-Linux64/bin directory with ls, I see python, python2 and python 2.7 files. I have even tried to grant all permissions to /Sen2Cor-02.08.00-Linux64/bin/python2.7 using chmod 777 and added this path to PYTHONPATH, but nothing helped.

Here is the .def file I am using to create SI:
test.def (556 Bytes)