To access your team members invitations, head to the Invitations & Requests tab. Click on the drop-down menu under Invited Team Member on the right hand side of this page, and tick off the team members whose invitations you want to see.

It is important to note that if the project has been marked private or closed by the builder - the documents will be inaccessible. The team member invited to the project may be able to forward the documents on or you may be able to reach out to the builder if this is not possible.