ZbxAPI_ExceptionPermissionError returns Hash-like message.

[veracosta]

I wrote following code which is intended to show some error messages from Zabbix.

begin
  @zabbix.raw_api('configuration.import',
    format: 'json',
    rules: {
      groups: {
        createMissing: true
        },
      applications: {
        createMissing: true,
        updateExisting: true
        },
      templates: {
        updateExisting: true,
        createMissing: true
        },
      templateScreens: {
        updateExisting: true,
        createMissing: true      
        },
      templateLinkage: {
        createMissing: true      
        },
      items: {
        updateExisting: true,
        createMissing: true      
        },
      discoveryRules: {
        updateExisting: true,
        createMissing: true      
        },
      triggers: {
        updateExisting: true,
        createMissing: true      
        },
      graphs: {
        updateExisting: true,
        createMissing: true      
        }
    },
    source: file
  )
rescue => evar
  p evar
end

When I run this code, very long message with Ruby's Hash format will be shown. Here's the beginning of the message.

#<ZbxAPI_ExceptionPermissionError: {"code"=>-32500, "message"=>"Application error.", "data"=>"Cannot import template \"Template1\", linked templates \"Template2, Template3\" do not exist.", "debug"=>...
...
...
"function"=>"execute", "class"=>"CJSONrpc", "type"=>"->", "args"=>[]}]}>

So I tried to output only the value of "message" key by running following code.

p evar["message"]

However, following exception message has appeared.

./script.rb:73:in `rescue in block in import_templates': undefined method `[]' for #<ZbxAPI_ExceptionPermissionError:0x18db438> (NoMethodError)
        from ./script.rb:30:in `block in import_templates'
        from ./script.rb:27:in `each'
        from ./script.rb:27:in `import_templates'
        from ./script.rb:79:in `<main>'
exit status 1

It seems that the error has occurred because it's not Hash.
Is it possible to get ZbxAPI_ExceptionPermissionError as a Hash object?