The problem is solved. I had to setup Sen2Cor environmental:
export SEN2COR_HOME=/home/opengeo/sen2cor
export SEN2COR_BIN=/home/opengeo/anaconda2/lib/python2.7/site-packages/sen2cor-2.3.0-py2.7.egg/sen2cor
export GDAL_DATA=/home/opengeo/anaconda2/lib/python2.7/site-packages/sen2cor-2.3.0-py2.7.egg/sen2cor/cfg/gdal_data