Help needed

Configuration
1

Hi, how to fix this problem, the online YAML validator could not pick up anything

# dwains_dashboard
## House-information add-on: Calendar
## Created by Jeroen Klompen
## Version: 1.1.0

- type: custom:dwains-heading-card
  title: {{ name }}
- type: custom:atomic-calendar-revive
  style: |
    ha-card {
      border-radius: 5px;
      background-color: var(--dwains-theme-primary);
    }
    .cal-titleContainer {
      display: none;
    }
  showProgressBar: false
  eventBarColor: 'var(--dwains-theme-grey)'
  dayWrapperLineColor: 'var(--dwains-theme-grey)'
  timeColor: 'var(--dwains-theme-grey)'
  entities:
    {{ (data | fromjson)['calendars'] }}

Screenshot_2021-03-15-21-58-03-72_c3a231c25ed346e59462e84656a70e50
Screenshot_2021-03-15-21-58-03-72_c3a231c25ed346e59462e84656a70e501080×2400 213 KB

2

missing multiline template indicator, > or |

3

Edit:

I found it

  entities: |
    {{ (data | fromjson)['calendars'] }}

Where exactly? Sorry, I am still learning.
Thank you