If you got to the last step of registering your company on the platform, but after submitting your application, the error "You don't have permission to do this action" appears, the problem is very likely due to the documents you uploaded in step 3 (Power of Attorney and Company Registry Extract). In this case, please (1) go back to step 3, (2) remove both attachments, (3) attach them again and (4) conclude the registration process.
If the error persists, make a screenshot of the error shown in the developer's tool and send it to helpdesk@prisma-capacity.eu.