[Vuejs]-Vue component registration

Is it a recursive component? If so, I think you need to use the same name you defined on the component (or the kebab version of it)

export default { 
    name: 'SubUnitDetails', 
    data() { 
        return { properties };
    }
}

import SubUnitDetails from '../subunitDetails';

export default {
    components: { SubUnitDetails },
}

<SubUnitDetails></SubUnitDetails >