Rails server giving Readline support error

I solved the issue by (commands for mac with homebrew and rbenv):

• installing readline brew install readline
• reinstalling / recompiling ruby rbenv install 2.3.1

July 2019 on Mac

I faced this same issue on my machine & running the following command solved it, note that even if you have version 8 of readline you still need to link to version 7 as shown:

ln -s /usr/local/opt/readline/lib/libreadline.dylib /usr/local/opt/readline/lib/libreadline.7.dylib

To fix this (for OSX, tested on Sierra), run following command in your shell -

ln -s /usr/local/opt/readline/lib/libreadline.dylib /usr/local/opt/readline/lib/libreadline.6.dylib