Answered JS Error restricting manager pages

TypeError: 'null' is not an object (evaluating 'b.dom')

 TypeError: 'null' is not an object (evaluating 'b.dom')
	onRender (ext-all.js, line 21)
	onRender (ext-all.js, line 21)
	onRender (ext-all.js, line 21)
	render (ext-all.js, line 21)
	Component (ext-all.js, line 21)
	(anonymous function) (ext-base.js, line 21)
	(anonymous function) (ext-base.js, line 21)
	(anonymous function) (ext-base.js, line 21)
	(anonymous function) (ext-base.js, line 21)
	FormPanel (index.php, line 233)
	TV (index.php, line 32)
	create (ext-all.js, line 21)
	load (modx.js, line 85)
	_loadComponents (index.php, line 197)
	Component (index.php, line 191)
	CreateTV (index.php, line 37)
	create (ext-all.js, line 21)
	load (modx.js, line 85)
	(anonymous function) (manager, line 30)
	(anonymous function) (ext-all.js, line 21)
	b (ext-all.js, line 21)