Oh… look at this:
Logger: homeassistant.components.automation
Source: components/automation/__init__.py:632
Integration: Automation (documentation, issues)
First occurred: 10:55:02 AM (20 occurrences)
Last logged: 1:12:29 PM
Blueprint Lava Lamp Timer generated invalid automation with inputs OrderedDict([('target_light', OrderedDict([('entity_id', 'light.lava_lamps')]))]): not a valid value for dictionary value @ data['action'][0]['entity_id']. Got None
Now to figure out what valid dictionary it wants