Q:

Bundle gem load error in Ruby

Attempting to install a theme for Jekyll while learning Jekyll/Ruby from scratch, I messed up something. Now I get an error message whenever I execute bundle. Anyone know how to fix? 
$ bundle -v
/usr/local/bin/bundle:23:in `load': cannot load such file -- 
/usr/lib/ruby/gems/2.3.0/gems/bundler-1.16.1/exe/bundle (LoadError)
    from /usr/local/bin/bundle:23:in `<main>'

There are many mentions to the error in the web, but also a general lack of consistency in answers/suggestions. 
I went ahead and 

apt-get --purge autoremove ruby
erased /var/lib/gems/
apt-get install ruby
apt-get install ruby-dev
gem install jekyll

but problem persists.
Is the issue perhaps akin to this, with similar solution?
Some relevant info: 
$ ruby -v
ruby 2.3.1p112 (2016-04-26) [x86_64-linux-gnu]
$ gem list
*** LOCAL GEMS ***
...
bundler (default: 1.16.1)
...

Running ubuntu 16.04.

A:

Try this $ gem update --system  2.7.4

