Filter-entity doesn't work

My Home Assistant version: 2021.4.5

Fold-entity-row version (FROM BROWSER CONSOLE): 20.0.4

What I am doing: I added type: entity-filter in the entities: list of fold-entity-row card

What I expected to happen: see the entity-filter. The entity-filter config works when I put it in a standalone card.

What happened instead: Unknown type encountered: entity-filter

Minimal steps to reproduce: as mentioned in "What I am doing"

# The least ammount of code possible to reproduce my error

type: entities
entities:
  - type: 'custom:fold-entity-row'
    head: some.entity
    entities:
      - type: entity-filter
        entities:
          - some.entity
        state_filter:
          - on

# End of code

Error messages from the browser console:

row entity-filter Error: Unknown type encountered: entity-filter at d (chunk.1f510d4b62a23dbb7a38.js:formatted:5364) at c (chunk.1f510d4b62a23dbb7a38.js:formatted:5302) at Module.a (chunk.1f510d4b62a23dbb7a38.js:formatted:5494) at HTMLElement._createRow (fold-entity-row.js:1) at async Promise.all (index 0) at async https:/192.168.0.200:8123/hacsfiles/lovelace-fold-entity-row/fold-entity-row.js:1

By putting an X in the boxes ([X]) below, I indicate that I:

[X] Understand that this is a channel for reporting bugs, not a support forum (https://community.home-assistant.io/).
[X] Have made sure I am using the latest version of the plugin.
[X] Have followed the troubleshooting steps of the "Common Problems" section of https://github.com/thomasloven/hass-config/wiki/Lovelace-Plugins.
[X] Understand that leaving one or more boxes unticked or failure to follow the template above may increase the time required to handle my bug-report, or cause it to be closed without further action.

thomasloven / lovelace-fold-entity-row

Filter-entity doesn't work #152