Can't install JSON gem

Question

I need to install json because I get this error:

Could not find json-1.4.6 in any of the sources

I ran gem install json and b

Answer 1

I had this problem when trying to build a website with Jekyll.

Turned out I hadn't followed all the instructions at https://jekyllrb.com/docs/installation/ubuntu/

I don't know if it was the missing packages or commands into ~/.bashrc but it fixed the problem in two instances of Ubuntu in WSL