Upload screen recording on Dropob using Jitsi API

Hi everyone,
i am trying to upload dropbox registration using jitsi API. This is my setup:
for start:
api.executeCommand(‘startRecording’, {
mode: ‘file’,
dropboxToken: ‘XXXXXXXXX’,
});
for stop:
api.executeCommand(‘stopRecording’, ‘file’);

And this works.The recording start and stop correctly(no error on web-console).
But on dropbox i don’t see anything.
Are there any other configurations to perform?

Thanks in advance. Regards.