Cannot set property 'alive' of undefined

[Astraport]

I use your Three.JS library to create particle effects in my project. Thanks.

<script src="js/Three.js/Three.js"></script>
<script src="js/Three.js/Detector.js"></script>  <script src="js/Three.js/OrbitControls.js"></script> 
<script src="js/Three.js/THREEx.FullScreen.js"></script>
<script src="js/Three.js/THREEx.WindowResize.js"></script>
<script src="js/Three.js/ParticleEngine.js"></script>
<script src="js/Three.js/ParticleEngineExamples.js"></script>

However, at the start of the application I keep getting errors such content.

Uncaught TypeError: Cannot set property 'alive' of undefined
    at ParticleEngine.update (ParticleEngine.js:413)
    at update (ct_main.js:819)
    at animate (ct_main.js:778)

How to fix it?