ESPHOME 2025.2.1 + LD2450 = problem?

I had the same problem and made the following changes and it builds successfully now:

external_components:
  - source:
      type: git
      url: https://github.com/screekworkshop/custom_components_support_for_screek_2a
      ref: main
    components: [uart]

And added the following to the PIN configuration:

output:
  - platform: gpio
    id: board_info_ed
    pin: 
      number: GPIO12
      ignore_pin_validation_error: true