Hi Pedro,

There is a bug in the error logging, I notice. I will raise the issue on github.

For now, can you please edit the file C:\Users\Pedro Monteiro\pt\adapt_authoring\routes\download\index.js and on line 53, change the line:

logger.log('error', error);

to

logger.log('error', err);

And then attempt a preview again. You will still get an error, but there should be more information in the error message. Please post that error.

However: before you do any of that, please ensure that you have tried a completely fresh install of the tool. This means removing the directory C:\Users\Pedro Monteiro\pt\adapt_authoring completely, cloning the project from github again, and rerunning the "npm install" and "node install" steps.