Garbage Collection: sensor not created

I am using this plugin and have created some garbage reminders. Now, I want to create a reminder to charge my keyboard every 25 days. I’ve added this code, but the sensor do not show up after a reboot. Can someone correct my mistakes?

  - name: 'Charge Keyboard'
    frequency: 'every-n-days'
    first_date: '2020-07-20'
    period: 25
    icon_normal: mdi:keyboard
    verbose_state: true
    verbose_format: '{days} days'

Please verify that there are no errors in your logs. Also, did you place this in the correct config location?

After a restart, I see this error. This sensor is placed along with the other garbage sensors I have successfully created.

Logger: homeassistant.config_entries
Source: helpers/entity_component.py:176
First occurred: 11:12:14 PM (1 occurrences)
Last logged: 11:12:14 PM

Error unloading entry configuration.yaml for sensor
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/config_entries.py", line 307, in async_unload
    hass, self
  File "/usr/src/homeassistant/homeassistant/components/sensor/__init__.py", line 64, in async_unload_entry
    return await hass.data[DOMAIN].async_unload_entry(entry)
  File "/usr/src/homeassistant/homeassistant/helpers/entity_component.py", line 176, in async_unload_entry
    raise ValueError("Config entry was never loaded!")
ValueError: Config entry was never loaded!

Can you please post the logs from the log file inside your config folder? It should be named homeassistant.log

My bad. It was working from the start. I forgot I had to add the sensor to my existing group of sensors. Thank you.