PHP Warning: Undefined array key "object" in /home/xxx/projects/camunda-api-client/vendor/jane-php/open-api-3/Generator/Parameter/NonBodyParameterGenerator.php on line 197

[comod]

Jane version(s) affected: 7.5 (latest install according to docs)

Description
Code-Gen fails with Warning:

PHP Warning:  Undefined array key "object" in /home/xxx/projects/camunda-api-client/vendor/jane-php/open-api-3/Generator/Parameter/NonBodyParameterGenerator.php on line 197
PHP Fatal error:  Uncaught TypeError: Jane\Component\OpenApi3\Generator\Parameter\NonBodyParameterGenerator::convertParameterType(): Return value must be of type array, null returned in /home/xxx/projects/camunda-api-client/vendor/jane-php/open-api-3/Generator/Parameter/NonBodyParameterGenerator.php:197
Stack trace:
#0 /home/xxx/projects/camunda-api-client/vendor/jane-php/open-api-3/Generator/Parameter/NonBodyParameterGenerator.php(153): Jane\Component\OpenApi3\Generator\Parameter\NonBodyParameterGenerator->convertParameterType()
#1 /home/xxx/projects/camunda-api-client/vendor/jane-php/open-api-3/Generator/Endpoint/GetConstructorTrait.php(60): Jane\Component\OpenApi3\Generator\Parameter\NonBodyParameterGenerator->generateOptionDocParameter()
#2 /home/xxx/projects/camunda-api-client/vendor/jane-php/open-api-3/Generator/EndpointGenerator.php(82): Jane\Component\OpenApi3\Generator\EndpointGenerator->getConstructor()
#3 /home/xxx/projects/camunda-api-client/vendor/jane-php/open-api-common/Generator/OperationGenerator.php(38): Jane\Component\OpenApi3\Generator\EndpointGenerator->createEndpointClass()
#4 /home/xxx/projects/camunda-api-client/vendor/jane-php/open-api-common/Generator/ClientGenerator.php(38): Jane\Component\OpenApiCommon\Generator\OperationGenerator->createOperation()
#5 /home/xxx/projects/camunda-api-client/vendor/jane-php/json-schema/Generator/ChainGenerator.php(28): Jane\Component\OpenApiCommon\Generator\ClientGenerator->generate()
#6 /home/xxx/projects/camunda-api-client/vendor/jane-php/open-api-common/Console/Command/GenerateCommand.php(61): Jane\Component\JsonSchema\Generator\ChainGenerator->generate()
#7 /home/xxx/projects/camunda-api-client/vendor/symfony/console/Command/Command.php(326): Jane\Component\OpenApiCommon\Console\Command\GenerateCommand->execute()
#8 /home/xxx/projects/camunda-api-client/vendor/symfony/console/Application.php(1063): Symfony\Component\Console\Command\Command->run()
#9 /home/xxx/projects/camunda-api-client/vendor/symfony/console/Application.php(320): Symfony\Component\Console\Application->doRunCommand()
#10 /home/xxx/projects/camunda-api-client/vendor/symfony/console/Application.php(174): Symfony\Component\Console\Application->doRun()
#11 /home/xxx/projects/camunda-api-client/vendor/jane-php/open-api-common/bin/jane-openapi(24): Symfony\Component\Console\Application->run()
#12 /home/xxx/projects/camunda-api-client/vendor/bin/jane-openapi(120): include('...')
#13 {main}
  thrown in /home/xxx/projects/camunda-api-client/vendor/jane-php/open-api-3/Generator/Parameter/NonBodyParameterGenerator.php on line 197

How to reproduce
Specs file: https://docs.camunda.org/rest/camunda-bpm-platform/7.21-SNAPSHOT/

<?php
// jane-openapi-configuration.php
return [
    'openapi-file' => __DIR__ . '/openapi-camunda-7.21.0.json',
    'namespace' => 'Xxx\NewCamundaApiClient',
    'directory' => __DIR__ . '/generated',
];

With command:

php vendor/bin/jane-openapi generate --config-file=jane-openapi-configuration.php