Problem insert audio in a post

1

Good afternoon. I insert audio in the posts and they do not appear. For a while everything was correct but suddenly it’s gone. Could you tell me what the problem is?

Thank you.

This is example pages: https://victorsnk.gitlab.io/habando_tecnologia_2019/ you can see it in my gitlab

2

Hum, put here your example, or link to your example!
(if you want really help)