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ERROR TypeError: Cannot set property 'selected' of undefined

See original GitHub issue

ERROR TypeError: Cannot set property 'selected' of undefined at SlideshowComponent.buildSlideArray (ng-simple-slideshow.es5.js:325) at SlideshowComponent.setSlides (ng-simple-slideshow.es5.js:280) at SlideshowComponent.ngDoCheck (ng-simple-slideshow.es5.js:95) at checkAndUpdateDirectiveInline (core.js:12372) at checkAndUpdateNodeInline (core.js:13893) at checkAndUpdateNode (core.js:13836) at debugCheckAndUpdateNode (core.js:14729) at debugCheckDirectivesFn (core.js:14670) at Object.eval [as updateDirectives] (DetailProductsComponent.html:3) at Object.debugUpdateDirectives [as updateDirectives] (core.js:14655) View_DetailProductsComponent_0 @ DetailProductsComponent.html:3 proxyClass @ compiler.js:14653 DebugContext_.logError @ core.js:14996 ErrorHandler.handleError @ core.js:1509 (anonymous) @ core.js:5914 ZoneDelegate.invoke @ zone.js:388 Zone.run @ zone.js:138 NgZone.runOutsideAngular @ core.js:4697 ApplicationRef.tick @ core.js:5914 (anonymous) @ core.js:5740 ZoneDelegate.invoke @ zone.js:388 onInvoke @ core.js:4749 ZoneDelegate.invoke @ zone.js:387 Zone.run @ zone.js:138 NgZone.run @ core.js:4566 next @ core.js:5740 schedulerFn @ core.js:4331 SafeSubscriber.__tryOrUnsub @ Subscriber.js:240 SafeSubscriber.next @ Subscriber.js:187 Subscriber._next @ Subscriber.js:128 Subscriber.next @ Subscriber.js:92 Subject.next @ Subject.js:56 EventEmitter.emit @ core.js:4311 checkStable @ core.js:4714 onHasTask @ core.js:4762 ZoneDelegate.hasTask @ zone.js:441 ZoneDelegate._updateTaskCount @ zone.js:461 Zone._updateTaskCount @ zone.js:285 Zone.runTask @ zone.js:205 drainMicroTaskQueue @ zone.js:595 Promise.then (async) scheduleMicroTask @ zone.js:578 ZoneDelegate.scheduleTask @ zone.js:410 Zone.scheduleTask @ zone.js:232 Zone.scheduleMicroTask @ zone.js:252 scheduleResolveOrReject @ zone.js:856 ZoneAwarePromise.then @ zone.js:946 PlatformRef.bootstrapModule @ core.js:5568 (anonymous) @ main.ts:13 ./src/main.ts @ main.bundle.js:613 __webpack_require__ @ inline.bundle.js:55 0 @ main.bundle.js:621 __webpack_require__ @ inline.bundle.js:55 webpackJsonpCallback @ inline.bundle.js:26 (anonymous) @ main.bundle.js:1 i’m trying to use simple slideshow in Angular 5.2.9, CLI 1.7.3, Node 9.10.1 but got the error