Tried to copy and make something similar to the Demo

[fuegod03]

Error on console:
pieces.min.js:1 Uncaught TypeError: Cannot read property '0' of undefined at l.getPieces (pieces.min.js:1) at l.animatePieces (pieces.min.js:1) at l.showPieces (pieces.min.js:1) at showItems (app.js:122) at app.js:116 getPieces @ pieces.min.js:1 animatePieces @ pieces.min.js:1 showPieces @ pieces.min.js:1 showItems @ app.js:122 (anonymous) @ app.js:116

Error on file pices.min.js:
this.items[t].pieces:g.arr(t)?t.forEach(function(t){return g.num(t)?a(i,e.items[t].pieces):a(i,t.pieces)}):i=t.pieces,i},getItems:function(t){var e=this,i=[];return g.und(t)?i=this.items:g.num(t)?i=this.items[t]:g.arr(t)?t.forEach(function(t){return g.num(t)?i.push(e.items[t]):i.push(t)}):i=t,i},animatePieces:function(t){var e=n({duration:function(t){return t.duration},delay:function(t){return t.delay},easing:function(t){return t.easing},remove:!0,singly:!1},t),i=this.getPieces(t.items);e.remove&&anime.remove(i),e.ignore&&e.ignore.forEach(function(t){return delete e[t]}),e.singly?i.forEach(function(t){return anime(n(e,{targets:t}))}):anime(n(e,{targets:i}))},showPieces:function(t){var e=n({x:function(t){return t.s_x},y:function(t){return t.s_y},w:function(t){return t.s_w},h:function(t){return t.s_h},tx:function(t){return t.s_tx},ty:function(t){return t.s_ty}},t);this.animatePieces(e)},hidePieces:function(t){var e=n({x:function(t){return t.h_x},y:function(t){return t.h_y},w:function(t){return t.h_w},h:function(t){return t.h_h},tx:function(t){return t.h_tx},ty:function(t){return t.h_ty}},t);this.animatePieces(e)},animateItems:function(t){var e=n({easing:"linear",remove:!0},t,{targets:this.getItems(t.items)});e.remove&&anime.remove(e.targets),anime(e)}},l.version="1.0.0",l.random=anime.random,l.extend=n,l});

[lmgonzalves]

Please sorry the delay.
Can you provide a minimal working demo on jsfiddle or codepen?