@stewart Your Sendgrid email request is invalid. I tried this on your HOME page using a valid email address and this is what I get:
You will need to provide the required information to the sendGrid NPM library. Wix provides support for Sendgrid by allowing REST and NPM interfaces, but it is not part of the Wix product. If you are having difficulties with the interface, then you should refer your questions to Sendgrid .