No such file or directory @ rb_sysopen - ../_contents/illusts/2012files.txt
(erb):49:in `readlines'
(erb):49:in `new_erb'
/usr/local/ruby/2.6/lib/ruby/2.6.0/erb.rb:901:in `eval'
/usr/local/ruby/2.6/lib/ruby/2.6.0/erb.rb:901:in `result'
index.rb:11:in `new_erb'
index.rb:80:in `<main>'