Warning: Received `false` for a non-boolean attribute `className`. about graphiql-rails

[shelmire]

Caused by an error that was recently fixed in graphiql: graphql/graphiql#724

Looks like there hasn't been a release since it was merged though.

[dorianco]

Same error here with rails-api setup

Gemfile

    graphiql-rails (1.5.0)
    graphql (1.8.11)
    graphql-docs (1.6.0)
      commonmarker (~> 0.16)
      escape_utils (~> 1.2)
      extended-markdown-filter (~> 0.4)
      gemoji (~> 3.0)
      graphql (~> 1.6)
      html-pipeline (~> 2.8)
      sass (~> 3.4)
    graphql-errors (0.2.0)
      graphql (>= 1.6.0, < 2)
    graphql-guard (1.2.1)
      graphql (>= 1.6.0, < 2)

[heatherbooker]

I had this error and updated to 0.13.2 and error is gone! 🙌