When I set up ruby on rails setup on Ubuntu it starts working perfectly but after I restart my PC it gives me error on rails server command as shown:
/usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in \`require': cannot load such file -- bundler (LoadError)
from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in \`require'
from /home/muhammad/myapp/one/bin/spring:8:in \`<top (required)>'
from bin/rails:3:in \`load'
from bin/rails:3:in \`<main>'