HA Integratoin error: Config-flow error: {"message":"Invalid handler specified"}

[TheMoose92]

Hello,

I recently updated all HA software. However, my miner integration stopped working, showing the following error.
I've already tried to update to recent version v.1.2.7rc2. I'm running on a raspberry Pi, with following versions:

Core 2026.3.4
Supervisor 2026.03.2
Operating System 17.1
Frontend 20260312.1

`Logger: homeassistant.setup
Bron: setup.py:343
Eerst voorgekomen: 12:06:22 (1 gebeurtenis)
Laatst gelogd: 12:06:22

Setup failed for custom integration 'miner': Unable to import component: Exception importing custom_components.miner
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1083, in _get_component
    ComponentProtocol, importlib.import_module(self.pkg_path)
                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 201, in protected_loop_func
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.14/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1398, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1371, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1342, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 938, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 759, in exec_module
  File "<frozen importlib._bootstrap>", line 491, in _call_with_frames_removed
  File "/config/custom_components/miner/__init__.py", line 6, in <module>
    import pyasic
  File "/usr/local/lib/python3.14/site-packages/pyasic/__init__.py", line 20, in <module>
    from pyasic.data import MinerData
  File "/usr/local/lib/python3.14/site-packages/pyasic/data/__init__.py", line 35, in <module>
    class MinerData(BaseModel):
    ...<475 lines>...
            return " ".join([tags_str, field_str, timestamp])
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_model_construction.py", line 255, in __new__
    complete_model_class(
    ~~~~~~~~~~~~~~~~~~~~^
        cls,
        ^^^^
    ...<3 lines>...
        create_model_module=_create_model_module,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_model_construction.py", line 648, in complete_model_class
    schema = gen_schema.generate_schema(cls)
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 729, in generate_schema
    schema = self._generate_schema_inner(obj)
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 1023, in _generate_schema_inner
    return self._model_schema(obj)
           ~~~~~~~~~~~~~~~~~~^^^^^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 856, in _model_schema
    {k: self._generate_md_field_schema(k, v, decorators) for k, v in fields.items()},
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 1228, in _generate_md_field_schema
    schema, metadata = self._common_field_schema(name, field_info, decorators)
                       ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 1282, in _common_field_schema
    schema = self._apply_annotations(
        source_type,
        annotations + validators_from_decorators,
    )
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 2227, in _apply_annotations
    schema = get_inner_schema(source_type)
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_schema_generation_shared.py", line 83, in __call__
    schema = self._handler(source_type)
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 2206, in inner_handler
    schema = self._generate_schema_inner(obj)
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 1028, in _generate_schema_inner
    return self.match_type(obj)
           ~~~~~~~~~~~~~~~^^^^^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 1148, in match_type
    return self._unknown_type_schema(obj)
           ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 659, in _unknown_type_schema
    raise PydanticSchemaGenerationError(
    ...<7 lines>...
    )
pydantic.errors.PydanticSchemaGenerationError: Unable to generate pydantic-core schema for <property object at 0x7f6e826020>. Set `arbitrary_types_allowed=True` in the model_config to ignore this error or implement `__get_pydantic_core_schema__` on your type to fully support it.

If you got this error by calling handler(<some type>) within `__get_pydantic_core_schema__` then you likely need to call `handler.generate_schema(<some type>)` since we do not call `__get_pydantic_core_schema__` on `<some type>` otherwise to avoid infinite recursion.

For further information visit https://errors.pydantic.dev/2.12/u/schema-for-unknown-type

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1023, in async_get_component
    comp = await self.hass.async_add_import_executor_job(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        self._get_component, True
        ^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/local/lib/python3.14/concurrent/futures/thread.py", line 86, in run
    result = ctx.run(self.task)
  File "/usr/local/lib/python3.14/concurrent/futures/thread.py", line 73, in run
    return fn(*args, **kwargs)
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1094, in _get_component
    raise ImportError(f"Exception importing {self.pkg_path}") from err
ImportError: Exception importing custom_components.miner

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1083, in _get_component
    ComponentProtocol, importlib.import_module(self.pkg_path)
                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 201, in protected_loop_func
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.14/importlib/__init__.py", line 88, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1398, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1371, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1342, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 938, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 759, in exec_module
  File "<frozen importlib._bootstrap>", line 491, in _call_with_frames_removed
  File "/config/custom_components/miner/__init__.py", line 6, in <module>
    import pyasic
  File "/usr/local/lib/python3.14/site-packages/pyasic/__init__.py", line 20, in <module>
    from pyasic.data import MinerData
  File "/usr/local/lib/python3.14/site-packages/pyasic/data/__init__.py", line 35, in <module>
    class MinerData(BaseModel):
    ...<475 lines>...
            return " ".join([tags_str, field_str, timestamp])
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_model_construction.py", line 255, in __new__
    complete_model_class(
    ~~~~~~~~~~~~~~~~~~~~^
        cls,
        ^^^^
    ...<3 lines>...
        create_model_module=_create_model_module,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_model_construction.py", line 648, in complete_model_class
    schema = gen_schema.generate_schema(cls)
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 729, in generate_schema
    schema = self._generate_schema_inner(obj)
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 1023, in _generate_schema_inner
    return self._model_schema(obj)
           ~~~~~~~~~~~~~~~~~~^^^^^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 856, in _model_schema
    {k: self._generate_md_field_schema(k, v, decorators) for k, v in fields.items()},
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 1228, in _generate_md_field_schema
    schema, metadata = self._common_field_schema(name, field_info, decorators)
                       ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 1282, in _common_field_schema
    schema = self._apply_annotations(
        source_type,
        annotations + validators_from_decorators,
    )
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 2227, in _apply_annotations
    schema = get_inner_schema(source_type)
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_schema_generation_shared.py", line 83, in __call__
    schema = self._handler(source_type)
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 2206, in inner_handler
    schema = self._generate_schema_inner(obj)
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 1028, in _generate_schema_inner
    return self.match_type(obj)
           ~~~~~~~~~~~~~~~^^^^^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 1148, in match_type
    return self._unknown_type_schema(obj)
           ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^
  File "/usr/local/lib/python3.14/site-packages/pydantic/_internal/_generate_schema.py", line 659, in _unknown_type_schema
    raise PydanticSchemaGenerationError(
    ...<7 lines>...
    )
pydantic.errors.PydanticSchemaGenerationError: Unable to generate pydantic-core schema for <property object at 0x7f6e73bb00>. Set `arbitrary_types_allowed=True` in the model_config to ignore this error or implement `__get_pydantic_core_schema__` on your type to fully support it.

If you got this error by calling handler(<some type>) within `__get_pydantic_core_schema__` then you likely need to call `handler.generate_schema(<some type>)` since we do not call `__get_pydantic_core_schema__` on `<some type>` otherwise to avoid infinite recursion.

For further information visit https://errors.pydantic.dev/2.12/u/schema-for-unknown-type

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/setup.py", line 343, in _async_setup_component
    component = await integration.async_get_component()
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1043, in async_get_component
    self._component_future.result()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1035, in async_get_component
    comp = self._get_component()
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1094, in _get_component
    raise ImportError(f"Exception importing {self.pkg_path}") from err
ImportError: Exception importing custom_components.miner`

What can i do to fix this?

[erwindr67]

[https://github.com//issues/587]

[TheMoose92]

Hard to understand what the exact solution is. I'm now trying to delete miner via HACS and reïnstall bottom-up.

[EDIT] I keep getting the following error when trying to reinstall the miner-integration:
Config-flow kon niet geladen worden: {"message":"Invalid handler specified"} [/EDIT]

[floi001]

I get the same error message when I try to install. (Invalid handler specified)

[mypetcow]

Same issue with the following Home Assistant configuration when installing the miner integration:

OS Version: Home Assistant OS 17.1
Home Assistant Core: 2026.3.3

Config flow could not be loaded: {"message":"Invalid handler specified"}

[TheMoose92]

Unfortunately still no solution. :-(