Can SickBeard be installed on EX4?

My Cloud OS 3 Personal & Network Attached Storage My Cloud EX4
4

I am on fw 2.10.310

after running the second command line it says:

-sh: docker: not found

I also tried to follow [GUIDE] Sickbeard on MyCloud, but after running

/usr/bin/python2.7 /usr/share/sickbeard/SickBeard.py

I get

-sh: /usr/bin/python2.7: not found

Any suggestions?