Failed validating 'additionalProperties' in display_data['properties']['data']:

On instance['cells'][19]['outputs'][1]['data']:
{'application/javascript': '\n'
                           '(function(root) {\n'
                           '  function now() {\n'
                           '    return new Date();\n'
                           '  }...',
 'application/vnd.bokehjs_load.v0+json': '\n'
                                         '(function(root) {\n'
                                         '  function now() {\n'
                                         '    return new Date();\n'
                                         '  }...'}