I am trying to: add a post form to a layout that I want to create for editing posts
Link to a page where the issue can be seen: it is in the backend. Do you need access?
I am using a child template of understrap, but the problem also is present when using twentyseventeen. Please see the javascript error in the console:
load-scripts.php?c=1&load[]=underscore,shortcode,utils,jquery-core,jquery-migrate,backbone,wp-util,wp-backbone,media-models,moxiejs,plupload,wp-plupload,jqu&load[]=ery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable&ver=4.9.6:17 JQMIGRATE: Migrate is installed, version 1.4.1
onloadwff.js:64 Failure with checking formfill: TypeError: Cannot read property 'aid' of null ln: undefined
[Deprecation] Styling master document from stylesheets defined in HTML Imports is deprecated, and is planned to be removed in M67, around May 2018. Please refer to <em><u>hidden link</u></em> for possible migration paths.
util.js:248 Google Maps API warning: RetiredVersion <em><u>hidden link</u></em>
UC.j @ util.js:248
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:147
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:62
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:60
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:62
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:125
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:60
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:125
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:60
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:125
ae @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:62
$d.na @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:125
(anonymous) @ util.js:1
onloadwff.js:64 Failure with checking formfill: TypeError: Cannot read property 'aid' of null ln: undefined
onloadwff.js:64 Failure with checking formfill: TypeError: Cannot read property 'aid' of null ln: undefined
load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-position,j&load[]=query-ui-menu,wp-a11y,jquery-ui-autocomplete,underscore,jquery-ui-draggable,jquery-ui-slider,jquery-touch-punch,iris,wp-color-pi&load[]=cker,jquery-ui-resizable,jquery-ui-button,jquery-ui-dialog,jquery-ui-tabs,backbone,jquery-effects-core,jquery-effects-size,jquer&load[]=y-effects-scale,wp-pointer,quicktags,wplink,shortcode,wp-util&ver=4.9.6:9 JQMIGRATE: Migrate is installed, version 1.4.1
frame_event_publisher.min.js?ver=3.0.0:1 Uncaught TypeError: Cannot read property 'register_child' of undefined
at Object.broadcast (frame_event_publisher.min.js?ver=3.0.0:1)
at HTMLDocument.<anonymous> (frame_event_publisher.min.js?ver=3.0.0:1)
at i (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-position,j&load[]=query-ui-menu,wp-a11y,jquery-ui-autocomplete,underscore,jquery-ui-draggable,jquery-ui-slider,jquery-touch-punch,iris,wp-color-pi&load[]=cker,jquery-ui-resizable,jquery-ui-button,jquery-ui-dialog,jquery-ui-tabs,backbone,jquery-effects-core,jquery-effects-size,jquer&load[]=y-effects-scale,wp-pointer,quicktags,wplink,shortcode,wp-util&ver=4.9.6:2)
at Object.fireWith [as resolveWith] (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-position,j&load[]=query-ui-menu,wp-a11y,jquery-ui-autocomplete,underscore,jquery-ui-draggable,jquery-ui-slider,jquery-touch-punch,iris,wp-color-pi&load[]=cker,jquery-ui-resizable,jquery-ui-button,jquery-ui-dialog,jquery-ui-tabs,backbone,jquery-effects-core,jquery-effects-size,jquer&load[]=y-effects-scale,wp-pointer,quicktags,wplink,shortcode,wp-util&ver=4.9.6:2)
at Function.ready (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-position,j&load[]=query-ui-menu,wp-a11y,jquery-ui-autocomplete,underscore,jquery-ui-draggable,jquery-ui-slider,jquery-touch-punch,iris,wp-color-pi&load[]=cker,jquery-ui-resizable,jquery-ui-button,jquery-ui-dialog,jquery-ui-tabs,backbone,jquery-effects-core,jquery-effects-size,jquer&load[]=y-effects-scale,wp-pointer,quicktags,wplink,shortcode,wp-util&ver=4.9.6:2)
at HTMLDocument.K (load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-position,j&load[]=query-ui-menu,wp-a11y,jquery-ui-autocomplete,underscore,jquery-ui-draggable,jquery-ui-slider,jquery-touch-punch,iris,wp-color-pi&load[]=cker,jquery-ui-resizable,jquery-ui-button,jquery-ui-dialog,jquery-ui-tabs,backbone,jquery-effects-core,jquery-effects-size,jquer&load[]=y-effects-scale,wp-pointer,quicktags,wplink,shortcode,wp-util&ver=4.9.6:2)
broadcast @ frame_event_publisher.min.js?ver=3.0.0:1
(anonymous) @ frame_event_publisher.min.js?ver=3.0.0:1
i @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-position,j&load[]=query-ui-menu,wp-a11y,jquery-ui-autocomplete,underscore,jquery-ui-draggable,jquery-ui-slider,jquery-touch-punch,iris,wp-color-pi&load[]=cker,jquery-ui-resizable,jquery-ui-button,jquery-ui-dialog,jquery-ui-tabs,backbone,jquery-effects-core,jquery-effects-size,jquer&load[]=y-effects-scale,wp-pointer,quicktags,wplink,shortcode,wp-util&ver=4.9.6:2
fireWith @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-position,j&load[]=query-ui-menu,wp-a11y,jquery-ui-autocomplete,underscore,jquery-ui-draggable,jquery-ui-slider,jquery-touch-punch,iris,wp-color-pi&load[]=cker,jquery-ui-resizable,jquery-ui-button,jquery-ui-dialog,jquery-ui-tabs,backbone,jquery-effects-core,jquery-effects-size,jquer&load[]=y-effects-scale,wp-pointer,quicktags,wplink,shortcode,wp-util&ver=4.9.6:2
ready @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-position,j&load[]=query-ui-menu,wp-a11y,jquery-ui-autocomplete,underscore,jquery-ui-draggable,jquery-ui-slider,jquery-touch-punch,iris,wp-color-pi&load[]=cker,jquery-ui-resizable,jquery-ui-button,jquery-ui-dialog,jquery-ui-tabs,backbone,jquery-effects-core,jquery-effects-size,jquer&load[]=y-effects-scale,wp-pointer,quicktags,wplink,shortcode,wp-util&ver=4.9.6:2
K @ load-scripts.php?c=1&load[]=jquery-core,jquery-migrate,utils,suggest,jquery-ui-core,jquery-ui-widget,jquery-ui-mouse,jquery-ui-sortable,jquery-ui-position,j&load[]=query-ui-menu,wp-a11y,jquery-ui-autocomplete,underscore,jquery-ui-draggable,jquery-ui-slider,jquery-touch-punch,iris,wp-color-pi&load[]=cker,jquery-ui-resizable,jquery-ui-button,jquery-ui-dialog,jquery-ui-tabs,backbone,jquery-effects-core,jquery-effects-size,jquer&load[]=y-effects-scale,wp-pointer,quicktags,wplink,shortcode,wp-util&ver=4.9.6:2
onloadwff.js:64 Failure with checking formfill: TypeError: Cannot read property 'aid' of null ln: undefined
onloadwff.js:64 Failure with checking formfill: TypeError: Cannot read property 'aid' of null ln: undefined
onloadwff.js:64 Failure with checking formfill: TypeError: Cannot read property 'aid' of null ln: undefined
util.js:248 Google Maps API warning: RetiredVersion <em><u>hidden link</u></em>
UC.j @ util.js:248
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:147
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:62
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:60
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:62
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:125
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:60
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:125
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:60
(anonymous) @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:125
ae @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:62
$d.na @ js?libraries=places&v=3.30&key=AIzaSyDOGchLdKAUDduOoi4y4v82nP4mn89bqcI:125
(anonymous) @ util.js:1