Cast a dashboard via Chromecast: error

Hello together

I am tinkering around with a chromecast. I choose “play media” as an action, choose the mediaplayer (which is an HDMI screen with the chromecast plugged in) and choose a dashboard as media. All I am getting is an error:

[Errno 36] Filename too long: '/config/.storage/lovelace.https_embed_windy_com_embed2_html_lat_29_312_lon_30_752_detaillat_29_307_detaillon_30_757_width_900_height_600_zoom_7_level_surface_overlay_rain_product_ecmwf_menu_message_true_marker_true_calendar_24_pressure_type_map_location_coordinates_detail_metricwind_km_2fh_metrictemp_c2_b0c_radarrange_1_frameborder_0'

No clue in the zoo. Has anybody an idea what this could mean?