Media Player Set Volume Script Variable Error

Configuration
1

Using multiple-entity-row in lovelace to create volume buttons to adjust an HTD media player:

                  - icon: mdi:volume-plus
                    tap_action:
                      action: call-service
                      service: script.htd_volume_up
                      service_data:
                        keypad: media_player.htd_outside_couch

Script is setup as such:

htd_volume_up:
  alias: HTD Volume Up
  sequence:
    - service: media_player.volume_set
      data:
        entity_id: '{{ keypad }}'
        volume_level: "{{ state_attr(keypad, 'volume_level')|float|round(2) + 5/100 }}"

When reloading scripts I’m receiving this HA Error:

Logger: homeassistant.config
Source: config.py:443
First occurred: 10:43:23 AM (1 occurrences)
Last logged: 10:43:23 AM

Invalid config for [script]: invalid template (TemplateSyntaxError: unexpected ')') for dictionary value @ data['sequence'][0]['data']. Got None. (See /config/configuration.yaml, line 317).

Maybe worth noting that using this script works fine:

htd_volume_up2:
  alias: HTD Volume Up2
  sequence:
  - service: media_player.volume_up
    target:
      entity_id: '{{ keypad }}'

Thoughts? Thx in advance!

2

entity_id belongs to service, not data

htd_volume_up:
  alias: HTD Volume Up
  sequence:
    - service: media_player.volume_set
      entity_id: '{{ keypad }}'
      data:
        volume_level: "{{ state_attr(keypad, 'volume_level')|float|round(2) + 5/100 }}"