None is not a valid swagger2.0 file: module 'jsonschema._validators' has no attribute

[bukowa]

None is not a valid swagger2.0 file: module 'jsonschema._validators' has no attribute 'properties_draft4'

        If you get schema validation errors from a yaml Swagger spec that passes validation on other
        validators, it may be because of single apostrophe's (') used in some descriptions. The
        parser used does not like it at all.

Using this file: https://raw.githubusercontent.com/watchdogpolska/small_eod/master/docs/swagger.yaml

[bukowa]

The solution was upgrading swagger-spec-validator to latest version 2.4.3.
Now there's another problem:

/app/local/d.json is not a valid swagger2.0 file: ('\'components\', \'openapi\' do not match any of the regexes: \'^x-\'\n\nFailed validating \'additionalProperties\' in schema:\n    {\'$schema\': \'http://json-schema.org/draft-04/schema#\',\n     \'additionalProperties\': False,\n     \'definitions\': {\'apiKeySecurity\': {\'additionalProperties\': False,\n                                        \'patternProperties\': {\'^x-\': {\'$ref\': \'#/definitions/vendorExtension\'}},\n                                        \'properties\': {\'description\': {\'type\': \'string\'},\n                                                       \'in\': {\'enum\': [\'header\',\n                                                                       \'query\'],\n                                                              \'type\': \'string\'},\n                                                       \'name\': {\'type\': \'string\'},\n                                                       \'type\': {\'enum\': [\'apiKey\'],\n                                                                \'type\': \'string\'}},\n                                        \'required\': [\'type\', \'name\', \'in\'],\n                                        \'type\': \'object\'},\n                     \'basicAuthenticationSecurity\': {\'additionalProperties\': False,\n                                                     \'patternProperties\': {\'^x-\': {\'$ref\': \'#/definitions/vendorExtension\'}},\n                                                     \'properties\': {\'description\': {\'type\': \'string\'},\n                                                                    \'type\': {\'enum\': [\'basic\'],\n                                                                             \'type\': \'string\'}},\n                                                     \'required\': [\'type\'],\n                                                     \'type\': \'object\'},\n                     \'bodyParameter\': {\'additionalProperties\': False,\n                                       \'patternProperties\': {\'^x-\': {\'$ref\': \'#/definitions/vendorExtension\'}},\n                                       \'properties\': {\'description\': {\'description\': \'A \'\n                                                                                     \'brief \'\n                                                                                     \'description \'\n                                                                                     \'of \'\n                                                                                     \'the \'\n                                                                                     \'parameter. \'\n                                                                                     \'This \'\n                                                                                     \'could \'\n                                                                                     \'contain \'\n                                                                                     \'examples \'\n                                                                                     \'of \'\n                                                                                     \'use.  \'\n                                                                                     \'GitHub \'\n                                                                                     \'Flavored \'\n                                                                                     \'Markdown \'\n                                                                                     \'is \'\n                                                                                     \'allowed.\',\n                                                                      \'type\': \'string\'},\n                                                      \'in\': {\'description\': \'Determines \'\n                                                                            \'the \'\n                                                                            \'location \'\n                                                                            \'of \'\n                                                                            \'the \'\n                                                                            \'parameter.\',\n                                                             \'enum\': [\'body\'],\n                                                             \'type\': \'string\'},\n                                                      \'name\': {\'description\': \'The \'\n                                                                              \'name \'\n                                                                              \'of \'\n                                                                              \'the \'\n                                                                              \'parameter.\',\n                                                               \'type\': \'string\'},\n                                                      \'required\': {\'default\': False,\n                                                                   \'description\': \'Determines \'\n                                                                                  \'whether \'\n                                                                                  \'or \'\n                                                                                  \'not \'\n                                                                                  \'this \'\n                                                                                  \'parameter \'\n                                                                                  \'is \'\n                                                                                  \'required \'\n                                                                                  \'or \'\n                                                                                  \'optional.\',\n                                                                   \'type\': \'boolean\'},\n                                                      \'schema\': {\'$ref\': \'#/definitions/schema\'}},\n                                       \'required\': [\'name\', \'in\', \'schema\'],\n                                       \'type\': \'object\'},\n                     \'collectionFormat\': {\'default\': \'csv\',\n                                          \'enum\': [\'csv\',\n                                                   \'ssv\',\n                                                   \'tsv\',\n                                                   \'pipes\'],\n                                          \'type\': \'string\'},\n                     \'collectionFormatWithMulti\': {\'default\': \'csv\',\n                                                   \'enum\': [\'csv\',\n                                                            \'ssv\',\n                                                            \'tsv\',\n                                                            \'pipes\',\n                                                            \'multi\'],\n                                                   \'type\': \'string\'},\n                     \'contact\': {\'additionalProperties\': False,\n                                 \'description\': \'Contact information for \'\n                                                \'the owners of the API.\',\n                                 \'patternProperties\': {\'^x-\': {\'$ref\': \'#/definitions/vendorExtension\'}},\n                                 \'properties\': {\'email\': {\'description\': \'The \'\n                                                                         \'email \'\n                                                                         \'address \'\n                                                                         \'of \'\n                                                                         \'the \'\n                                                                         \'contact \'\n                                                                         \'person/organization.\',\n                                                          \'format\': \'email\',\n                                                          \'type\': \'string\'},\n                                                \'name\': {\'description\': \'The \'\n                                                                        \'identifying \'\n                                                                        \'name \'\n                                                                        \'of \'\n                                                                        \'the \'\n