Browsermod_mod no map

I a’m using browser mod with the following code but don’t receive any map. After i save the code the became content: null can someone help me so i receive a map?

                    tap_action:
                      action: fire-dom-event
                      browser_mod:
                        service: browser_mod.popup
                        data:
                          content: 
                          title: Aanwezig
                          entities:
                            - person.myhomeassistant
                            - zone.home
                            - device_tracker.m2003j15sc
                          hours_to_show: 24
                          default_zoom: 14
                          dark_mode: false
                          aspect_ratio: 15.5:6.5
                          type: map
                          timeout: 10000
                          size: wide