Each VHDL component must be matched with a corresponding entity, either based on its name and interface or through a configuration. When SVH encounters a component that cannot be linked to any entity, or a component that is linked to multiple entities, an issue is reported.
Rule Configuration
This rule can be disabled for your project, or its severity and parameters can be modified in the project linting settings. Alternatively, it can be manually configured with the following template:
90/severity/${path}={error|warning|info|ignore}