card_thermostat gives error when stepping temp up or down manually

[kohlerryan]

Describe the bug card_thermostat gives error when stepping temp up or down manually. First noticed after upgrade to HA 2024.8.1. Error message appears a bottom of screen. See screenshot for error message.

To Reproduce Steps to reproduce the behavior:

1. Add card_thermostat with these variables set:

  type: custom:button-card
  template: card_thermostat
  entity: climate.living_room_thermostat
  variables:
    ulm_card_thermostat_name: 'Living Room Thermostat'
    ulm_card_thermostat_enable_collapse: true
    ulm_card_thermostat_enable_controls: true
    ulm_card_thermostat_enable_hvac_modes: true
    ulm_card_thermostat_enable_background_color: true
    ulm_card_thermostat_temp_step: 1.0

2. Click to increase or decrease temp.
3. See error

Expected behavior Temp should increase by defined step - or default of 1.

Screenshots

Additional context I attempted to remove variable ulm_card_thermostat_temp_step:, as well as set it as 1 vs 1.0. Same result.