Breaking Menu Editor

With the plugin active, the navigation menu editor is broken. Deactivating the plugin resolves the issue. The console output is:

[Log] JQMIGRATE: Migrate is installed, version 3.4.0 (load-scripts.php, line 5)
[Error] TypeError: undefined is not an object (evaluating 'u.ui.mouse')
(anonymous function) (sortable.min.js:9:176)
(anonymous function) (sortable.min.js:9:107)
Global Code (sortable.min.js:9:116)
[Error] TypeError: undefined is not a function (near '…a.widget…')
(anonymous function) (droppable.min.js:9:208)
(anonymous function) (droppable.min.js:9:121)
Global Code (droppable.min.js:9:130)
[Error] Failed to load resource: the server responded with a status of 404 () (admin.js, line 0)
[Error] TypeError: undefined is not an object (evaluating 'z.ui.mouse')
(anonymous function) (resizable.min.js:9:177)
(anonymous function) (resizable.min.js:9:107)
Global Code (resizable.min.js:9:116)
[Error] TypeError: undefined is not a function (near '…r.widget…')
(anonymous function) (controlgroup.min.js:9:172)
(anonymous function) (controlgroup.min.js:9:97)
Global Code (controlgroup.min.js:9:106)
[Error] TypeError: undefined is not an object (evaluating 't.ui.formResetMixin')
(anonymous function) (checkboxradio.min.js:9:172)
(anonymous function) (checkboxradio.min.js:9:97)
Global Code (checkboxradio.min.js:9:106)
[Error] TypeError: undefined is not a function (near '…e.widget…')
(anonymous function) (button.min.js:9:188)
(anonymous function) (button.min.js:9:132)
Global Code (button.min.js:9:141)
[Error] TypeError: undefined is not a function (near '…l.widget…')
(anonymous function) (dialog.min.js:9:196)
(anonymous function) (dialog.min.js:9:146)
Global Code (dialog.min.js:9:155)
[Error] TypeError: undefined is not an object (evaluating 'o.ui.mouse')
(anonymous function) (slider.min.js:9:174)
(anonymous function) (slider.min.js:9:107)
Global Code (slider.min.js:9:116)
[Error] TypeError: a.widget is not a function. (In 'a.widget("a8c.iris",n)', 'a.widget' is undefined)
(anonymous function) (iris.min.js:5:16756)
Global Code (iris.min.js:5:16828)
[Error] TypeError: null is not an object (evaluating 'document.getElementById("discard_content").classList')
(anonymous function) (nav-menus.php:313)
[Error] TypeError: undefined is not a function (near '…i.widget…')
(anonymous function) (color-picker.min.js:2)
Global Code (color-picker.min.js:2:3444)
[Error] TypeError: undefined is not an object (evaluating 't.wp.wpColorPicker')
(anonymous function) (wp-color-picker-alpha.min.js:11)
Global Code (wp-color-picker-alpha.min.js:11:6712)
[Warning] jQuery.Deferred exception: undefined is not a function (near '…I.menuList.sortable…') (2) (jquery.js, line 2)
initSortables — nav-menu.min.js:2:10698
init — nav-menu.min.js:2:778
(anonymous function) — nav-menu.min.js:2:25282
e — jquery.js:2:30044
(anonymous function) — jquery.js:2:30342
undefined
[Warning] jQuery.Deferred exception: undefined is not a function (near '…$parent.find('.grimlock_section_widget-color-picker').wpColorPicker…') (2) (jquery.js, line 2)
(anonymous function) — widgets.js:141
(anonymous function) — widgets.js:429
e — jquery.js:2:30044
(anonymous function) — jquery.js:2:30342
undefined
[Error] TypeError: undefined is not a function (near '…I.menuList.sortable…')
(anonymous function) (jquery.js:2:31711)