Can’t post video in Gutenberg

Here is the error message when I add the FV Player Box in Gutenberg, insert the Vimeo Link and click “Insert”:

{“video_meta”:{“video”:{“0”:{“last_video_meta_check”:{“value”:”1584725302″},”auto_caption”:{“value”:”1″},”auto_splash”:{“value”:”1″},”duration”:{“value”:”336″}}},”hls”:{“0″:{},”20″:{}},”subtitles”:{“0”:[{“code”:””,”file”:””}]},”transcript”:{“0″:{}},”chapters”:{“0″:{}}},”player_meta”:{},”fv_wp_flowplayer_field_player_name”:””,”videos”:{“0”:{“fv_wp_flowplayer_field_src”:”https://vimeo.com/399118211″,”fv_wp_flowplayer_field_src1″:””,”fv_wp_flowplayer_field_src2″:””,”fv_wp_flowplayer_field_width”:””,”fv_wp_flowplayer_field_height”:””,”fv_wp_flowplayer_field_rtmp”:””,”fv_wp_flowplayer_field_rtmp_path”:””,”fv_wp_flowplayer_field_mobile”:””,”fv_wp_flowplayer_field_splash”:”https://i.vimeocdn.com/video/867076958_960x540.jpg?r=pad”,”fv_wp_flowplayer_field_splash_text”:””,”fv_wp_flowplayer_field_caption”:”Lobbyismus und Panikmache bei der WHO”,”fv_wp_flowplayer_field_start”:””,”fv_wp_flowplayer_field_end”:””,”fv_wp_flowplayer_hlskey”:””,”fv_wp_flowplayer_hlskey_cryptic”:””}},”fv_wp_flowplayer_field_subtitles_lang”:””,”fv_wp_flowplayer_field_width”:””,”fv_wp_flowplayer_field_height”:””,”fv_wp_flowplayer_field_autoplay”:””,”fv_wp_flowplayer_field_embed”:””,”fv_wp_flowplayer_field_align”:””,”fv_wp_flowplayer_field_controlbar”:””,”fv_wp_flowplayer_field_sticky”:””,”fv_wp_flowplayer_field_playlist”:””,”fv_wp_flowplayer_field_share”:””,”fv_wp_flowplayer_field_share_url”:””,”fv_wp_flowplayer_field_share_title”:””,”fv_wp_flowplayer_field_speed”:””,”fv_wp_flowplayer_field_playlist_advance”:””,”fv_wp_flowplayer_field_lightbox”:””,”fv_wp_flowplayer_field_lightbox_width”:””,”fv_wp_flowplayer_field_lightbox_height”:””,”fv_wp_flowplayer_field_lightbox_caption”:””,”fv_wp_flowplayer_field_ab”:””,”fv_wp_flowplayer_field_hflip”:””,”fv_wp_flowplayer_field_qsel”:””,”fv_wp_flowplayer_hlskey”:””,”fv_wp_flowplayer_hlskey_cryptic”:””,”fv_wp_flowplayer_field_copy_text”:””,”fv_wp_flowplayer_field_end_actions”:””,”fv_wp_flowplayer_field_redirect”:””,”fv_wp_flowplayer_field_popup_id”:””,”fv_wp_flowplayer_field_popup”:””,”fv_wp_flowplayer_field_email_list”:”0″,”fv_wp_flowplayer_field_ad”:””,”fv_wp_flowplayer_field_ad_width”:””,”fv_wp_flowplayer_field_ad_height”:””,”fv_wp_flowplayer_field_ad_skip”:””,”fv_wp_flowplayer_field_video_ads”:””,”fv_wp_flowplayer_field_video_ads_post”:””}

If I click on “refresch preview” it says “please log in”.
I don’t understand. Where should I “log in”?