Get 500 Internal server error

requestUrl: https://bespokecmsuat.wfcentral.cn/zh-Hant/api/tnc?filter%5Btype.key%5D=terms_and_conditions&filter%5Bapp_name.key%5D=HKL_CON, requestMethod:GET

response error:
{"jsonapi":{"version":"1.0","meta":{"links":{"self":{"href":"http:\/\/jsonapi.org\/format\/1.0\/"}}}},"errors":[{"title":"Internal Server Error","status":"500","detail":"A JSON:API response failed validation (see the logs for details). Report this in the Drupal issue queue at https:\/\/www.drupal.org\/project\/issues\/drupal","links":{"via":{"href":"https:\/\/bespokecmsuat.wfcentral.cn\/zh-Hant\/api\/tnc?filter%5Btype.key%5D=terms_and_conditions\u0026filter%5Bapp_name.key%5D=HKL_CON"},"info":{"href":"https:\/\/www.w3.org\/Protocols\/rfc2616\/rfc2616-sec10.html#sec10.5.1"}}}]}