Animation stops playing before the end when in preview or published on Animate CC

[-ppix27051104215q]

Hello, I made a simple animation to be published on a website using Adobe Animate CC. I'm not a pro and it's my first time ever using this program. When I play it inside Animate it plays until the end, if I export it to a video file it plays until the end of the timeline, but when I try to preview it or even publish it in HTML5 Canvas, it stops playing before the end of the timeline and I'm not figuring out why.

Can somebody help me understand what I'm missing and what should I do to be able to publish it so that it plays until the end of the timeline?

[Ged_Traynor]

Moved to the Animate forum from Using the Community

[kglad]

open your browser's developer console and look for errors.

lesson 1 - https://youtu.be/PBDQN9CQSeI

lesson 2 - https://youtu.be/KJEl0OenGUY