Bad request, Client Response Code 400

[dmnkmnr]

Before submitting a new issue

• [x] I redownloaded the latest release and restarted Home Assistant
• [x] I've checked known issues
• [x] I've enabled debug logs and attached the relevant logs to this ticket

Problem description

If I try to send a command towards the api (e.g. to set the zone operation mode), I get error code 400. Could it be bad authentication or a NULL parameter?

Logs

Logger: homeassistant.components.automation.heizung_heizung_ausschalten
Quelle: components/automation/__init__.py:666
Integration: Automatisierung (Dokumentation, Probleme)
Erstmals aufgetreten: 21:55:29 (2 Vorkommnisse)
Zuletzt protokolliert: 21:59:42

While executing automation automation.heizung_heizung_ausschalten
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/automation/__init__.py", line 666, in async_trigger
    return await self.action_script.async_run(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 1600, in async_run
    return await asyncio.shield(run.async_run())
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 435, in async_run
    await self._async_step(log_exceptions=False)
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 487, in _async_step
    self._handle_exception(
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 512, in _handle_exception
    raise exception
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 485, in _async_step
    await getattr(self, handler)()
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 723, in _async_call_service_step
    response_data = await self._async_run_long_action(
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 685, in _async_run_long_action
    return long_task.result()
           ^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/core.py", line 2319, in async_call
    response_data = await coro
                    ^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/core.py", line 2356, in _execute_service
    return await target(service_call)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 905, in entity_service_call
    single_response = await _handle_entity_call(
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 975, in _handle_entity_call
    result = await task
             ^^^^^^^^^^
  File "/config/custom_components/mypyllant/climate.py", line 564, in set_zone_operating_mode
    await self.coordinator.api.set_zone_operating_mode(
  File "/usr/local/lib/python3.12/site-packages/myPyllant/api.py", line 481, in set_zone_operating_mode
    await self.aiohttp_session.patch(
  File "/usr/local/lib/python3.12/site-packages/aiohttp/client.py", line 691, in _request
    await raise_for_status(resp)
  File "/usr/local/lib/python3.12/site-packages/myPyllant/http_client.py", line 49, in on_raise_for_status
    raise e
  File "/usr/local/lib/python3.12/site-packages/myPyllant/http_client.py", line 46, in on_raise_for_status
    response.raise_for_status()
  File "/usr/local/lib/python3.12/site-packages/aiohttp/client_reqrep.py", line 1060, in raise_for_status
    raise ClientResponseError(
aiohttp.client_exceptions.ClientResponseError: 400, message='Bad Request, response was: 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Request","status":"BAD_REQUEST","detail":"Validation failed for argument at index 2 in method: public default reactor.core.publisher.Mono<org.springframework.http.ResponseEntity<com.vaillantgroup.systemcontrol.tliv2.model.rest.AcceptedResponseRest>> com.vaillantgroup.systemcontrol.tliv2.rest.HeatingApi.v2SetHeatingOperationMode(java.lang.String,java.lang.Integer,reactor.core.publisher.Mono<com.vaillantgroup.systemcontrol.tliv2.model.rest.ModifyHeatingOperationModeRequestRest>,org.springframework.web.server.ServerWebExchange), with 1 error(s): [Field error in object \'modifyHeatingOperationModeRequestRestMono\' on field \'operationMode\': rejected value [null]; codes [NotNull.modifyHeatingOperationModeRequestRestMono.operationMode,NotNull.operationMode,NotNull.com.vaillantgroup.systemcontrol.tliv2.model.rest.ModifyHeatingOperationModeRequestRest$OperationModeEnum,NotNull]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [modifyHeatingOperationModeRequestRestMono.operationMode,operationMode]; arguments []; default message [operationMode]]; default message [must not be null]] ","parameters":{},"message":"Bad Request: Validation failed for argument at index 2 in method: public default reactor.core.publisher.Mono<org.springframework.http.ResponseEntity<com.vaillantgroup.systemcontrol.tliv2.model.rest.AcceptedResponseRest>> com.vaillantgroup.systemcontrol.tliv2.rest.HeatingApi.v2SetHeatingOperationMode(java.lang.String,java.lang.Integer,reactor.core.publisher.Mono<com.vaillantgroup.systemcontrol.tliv2.model.rest.ModifyHeatingOperationModeRequestRest>,org.springframework.web.server.ServerWebExchange), with 1 error(s): [Field error in object \'modifyHeatingOperationModeRequestRestMono\' on field \'operationMode\': rejected value [null]; codes [NotNull.modifyHeatingOperationModeRequestRestMono.operationMode,NotNull.operationMode,NotNull.com.vaillantgroup.systemcontrol.tliv2.model.rest.ModifyHeatingOperationModeRequestRest$OperationModeEnum,NotNull]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [modifyHeatingOperationModeRequestRestMono.operationMode,operationMode]; arguments []; default message [operationMode]]; default message [must not be null]] ","suppressed":[],"localizedMessage":"Bad Request: Validation failed for argument at index 2 in method: public default reactor.core.publisher.Mono<org.springframework.http.ResponseEntity<com.vaillantgroup.systemcontrol.tliv2.model.rest.AcceptedResponseRest>> com.vaillantgroup.systemcontrol.tliv2.rest.HeatingApi.v2SetHeatingOperationMode(java.lang.String,java.lang.Integer,reactor.core.publisher.Mono<com.vaillantgroup.systemcontrol.tliv2.model.rest.ModifyHeatingOperationModeRequestRest>,org.springframework.web.server.ServerWebExchange), with 1 error(s): [Field error in object \'modifyHeatingOperationModeRequestRestMono\' on field \'operationMode\': rejected value [null]; codes [NotNull.modifyHeatingOperationModeRequestRestMono.operationMode,NotNull.operationMode,NotNull.com.vaillantgroup.systemcontrol.tliv2.model.rest.ModifyHeatingOperationModeRequestRest$OperationModeEnum,NotNull]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [modifyHeatingOperationModeRequestRestMono.operationMode,operationMode]; arguments []; default message [operationMode]]; default message [must not be null]] "}', url=URL('https://api.vaillant-group.com/service-connected-control/end-user-app-api/v1/systems/5ed6ef15-7d13-4562-8f2b-f4c30e744e10/tli/zones/0/heating-operation-mode')