did not find expected key while parsing a block mapping

[Valentyna]

I'm using raml parsers (brujula, raml-rb), which are apparently using psych. Both gems show same error now, though 2 days ago everything was working just fine. Could you please take a look - maybe you a have a clue what the issue is

Psych::SyntaxError: (<unknown>): did not find expected key while parsing a block mapping at line 201 column 17 (schema)
        from /Users/vakalini/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/psych.rb:377:in `parse'
        from /Users/vakalini/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/psych.rb:377:in `parse_stream'
        from /Users/vakalini/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/psych.rb:325:in `parse'
        from /Users/vakalini/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/psych.rb:252:in `load'
        from /Users/vakalini/.rvm/gems/ruby-2.3.0/gems/raml-rb-1.2.1/lib/raml/parser.rb:20:in `parse'
        from /Users/vakalini/.rvm/gems/ruby-2.3.0/gems/raml-rb-1.2.1/lib/raml/parser.rb:29:in `parse_file'
        from /Users/vakalini/.rvm/gems/ruby-2.3.0/gems/raml-rb-1.2.1/lib/raml/parser.rb:40:in `parse_file'
        from (irb):51
        from /Users/vakalini/.rvm/rubies/ruby-2.3.0/bin/irb:11:in `<main>'
```