Gemfile: gem 'arel', '< 5.0.0'
Gemfile: gem 'arel', '< 5.0.0'

The Arel version 5 is incompatible with earlier Rails dependancies.

outstand/ransack,AndrewSwerlick/ransack,roman-franko/ransack,martndemus/ransack,nagyt234/ransack,avit/ransack,laserlemon/ransack,johan--/ransack,activerecord-hackery/ransack,Mario245/ransack,guilleva/ransack,vaski/ransack,praktijkindex/ransack,mariorcardoso/ransack,Eric-Guo/ransack,amboxer21/ransack,reinteractive/ransack