Python Error using MB 7.2.1

[KTAI-GIS]

Hi there
Sometimes I get an Error in QGIS 3.22.0 from the Modelbaker Plugin 7.2.1
It's a normal QGIS Project without use of Modelbaker functionality.
The error appears when I start the QGIS Project.

2022-09-19T09:46:01 WARNING Python error : An error has occurred while executing Python code: See message log (Python Error) for more details.

The Python Error Code looks like that:
2022-09-19T09:46:01 WARNING Traceback (most recent call last): File "C:\Users/username/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\QgisModelBaker\gui\validate.py", line 242, in set_current_layer self._refresh_schemadata_models() File "C:\Users/username/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\QgisModelBaker\gui\validate.py", line 261, in _refresh_schemadata_models self.schema_validations[ File "C:\Users/username/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\QgisModelBaker\utils\gui_utils.py", line 859, in refresh_model if db_connector.db_or_schema_exists() and db_connector.metadata_exists(): AttributeError: 'NoneType' object has no attribute 'db_or_schema_exists'