Hello Javier,

Please find below some steps to troubleshoot and resolve the issue, 

- Make sure the user (User:2) creating the e-Invoice has the necessary permissions to create accounting entries and invoices.

- Ensure that your e-invoice configuration, including your tax settings, journal configurations, and fiscal positions, is set up correctly.

- Verify that the user has the correct access rights for the accounting module

- Ensure that the user has access to the “Create e-Invoice” module. You can check this by going to the user's settings and looking at their access rights.

I hope this will help you.

Thanks & Regards,
Email:  odoo@aktivsoftware.com     

Skype: kalpeshmaheshwari