From console log:
Mixed Content: The page at 'https://ticonderoga1758.blogspot.com/2015/01/1-uszczelnianie-drewnianego-kubka.html?fbclid=IwAR2oN8rPFckinPMDK6My2-azV3Az8v67CzbroZgnr5z3vAGqEBnt-n4beRs' was loaded over HTTPS, but requested an insecure script 'http://ejucovy.github.io/readability/js/readability.js?x=0.5556703492697586'. This request has been blocked; the content must be served over HTTPS.
Posibble solution
https://help.github.com/articles/securing-your-github-pages-site-with-https/