error.log

TypeError: desc is undefined[Learn More] index.js:100
	exports.computed< index.js:100
	computedDecorator/< computed.js:28
	decoratorWithParams/</< decorator.js:46
	decorateElement decorate.js:118
	decorateClass/< decorate.js:83
	forEach self-hosted:262:13
	decorateClass decorate.js:81
	_decorate decorate.js:21
	<anonymous> main-map.js:9
	Module.prototype.exports loader.js:106
	requireModule loader.js:27
	_extractDefaultExport index.js:422
	resolveOther index.js:101
	resolve index.js:163
	_resolve container.js:820
	resolve container.js:570
	resolve container.js:574
	_has container.js:833
	has container.js:619
	proto.validateInjections container.js:783
	create container.js:407
	instantiateFactory container.js:277
	_lookup container.js:224
	lookup container.js:123
	lookup container_proxy.js:23
	_getHandlerFunction/< router.js:418
	fetchHandler router.js:575
	get router.js:734
	applyToState router.js:1160
	getTransitionByIntent router.js:1473
	transitionByIntent router.js:1280
	doTransition router.js:1908
	handleURL router.js:1311
	_doURLTransition router.js:258
	handleURL router.js:255
	startRouting router.js:140
	startRouting instance.js:119
	didBecomeReady application.js:492
	invoke backburner.js:247
	flush backburner.js:167
	flush backburner.js:326
	_end backburner.js:748
	Backburner/this._boundAutorunEnd backburner.js:483