You appear to be using my invitations plugin. Could you open an issue on GitHub?
Link Preview Image GitHub - NodeBB-Community/nodebb-plugin-user-invitations: A NodeBB plugin allowing current users to email invitations to potential new users.A NodeBB plugin allowing current users to email invitations to potential new users. - NodeBB-Community/nodebb-plugin-user-invitations
faviconGitHub (github.com)