Hi Sandra, you'll need to configure the Nintex Live Catalog to access the BOX action in the Catalog. You can see how to do this at Using Nintex Live Connector for Nintex Workflow 2010

You'll then have access to Catalog in the ribbon 

You then select Add to add these to your toolbox.

Hi Chris,

Thanks for the reply. I have the nintex catalog and added "Box Upload File". I set up the flow, however I got an error when I ran it. I didn't even get an authorization approver email to authorize uploading it to my BOX account.

Any ideas on how to fix this?