• all-contributors-cli version: 6.15.0
• node version: 14.2.0
• npm (or yarn) version: 1.22.4

What you did:

yarn run all-contributors add Silvest89
yarn run all-contributors generate

What happened:

Silvest89 has some string instead of url. So after generation of contributors template. Code was invalid html.

Suggested solution:

Please validate if url in github profile if it is valid url. If it isn't please use url to github profile.