Lead Set Chart unresponsive

Hey guys, I am trying to create a chart from the section Lead Details using the Set Chart option.

However, the settings for the chart are unresponsive and the browser console returns these errors which I don’t know how to interpret.

This is the latest master version of v12

[Error] Failed to load resource: the server responded with a status of 404 (Not Found) (awesomplete.min.js.map, line 0)
[Error] TypeError: null is not an object (evaluating 'e.classList')
	(anonymous function) (report.min.js:1:55265)
	forEach
	clearSelection (report.min.js:1:55244)
	focusCell (report.min.js:1:53041)
	(anonymous function) (report.min.js:1:52243)
	(anonymous function) (report.min.js:1:31687)
[Error] TypeError: undefined is not an object (evaluating 'l.filter(function(e){return e.fieldname==t.y_field})[0].label')
	primary_action (report.min.js:1:130370)
	(anonymous function) (desk.min.js:1:33350)
	dispatch (jquery.min.js:3:7543)
	handle (jquery.min.js:3:5626)
> Selected Element
< <div class="form-inner-toolbar">…</div>
[Error] Failed to load resource: the server responded with a status of 404 (Not Found) (awesomplete.min.js.map, line 0)