never saw such error, but multiple interpreter mode could mean you didn't installed uwsgi using specific python ( in my case, I used python2.7)
wget http://projects.unbit.it/downloads/uwsgi-xx.tar.gz tar xvzf uwsgi-xx.tar.gz cd uwsgi-xx /home/myusername/bin/python2.7 uwsgiconfig.py --build mv uwsgi /home/myusername/bin
