Hello
I'm trying to send an email using Thisitem.contact from a gallery and get the following error message, can anyone help please?

I can see its my name that has the error, but I dont want to have to put in individual email addresses , as the users could be over a thousand people. The contact field in the gallery is based on the user who was logged in at the time. The new user can then just hit a button an email the contact.
Hope that makes sense!
Thank you