snarvaez

I had the same issue, but I discovered something interesting that can point in the right direction. What I discovered is that for some reason, the call to the function $background_task->trigger … is not working.
But if instead we do a direct call to the method generate_audio( $post_id )
then the audio is generated in the S3 bucket, and then I can reproduce the audio in the player, and everything seems to work as expected.

So here is the file I edited:

wp-content/plugins/amazon-polly/admin/AmazonAI-PollyService.php

at the bottom of this function:
public function save_post( $post_id, $post, $updated ) {

You will find following lines of code:

if( ! ( wp_is_post_revision( $post_id) || wp_is_post_autosave( $post_id ) ) ) {
            $logger->log(sprintf('%s Starting background task process ( id=%s )', __METHOD__, $post_id));
            $background_task = new AmazonAI_BackgroundTask();
            $background_task->trigger(self::GENERATE_POST_AUDIO_TASK, [ $post_id ]);
            // *** Added this extra line here ***
            $this->generate_audio( $post_id ) ;
        }

I added that extra line at the end:

$this->generate_audio( $post_id ) ;

This is just calling directly a function that is located below in the same class.
Somehow that forces the audio to be generated on S3 bucket, and I can reproduce the audio in the player as expected.
Now, I will not claim that this is a correct fix, but it should point in the right direction, and it is working fine for me.