Emails not being received from Workflow

I have run my Workflow and the final step is an email being sent with files attached. I am not receiving the email and it is not going to my Spam folder. Could someone tell me why please.

Hey @atatu.co.nz

It seems that the attachment URL you are attempting to use is not available upon opening, as only publicly accessible file URLs are processable in the attachment field.

Additionally, I suggest trying the latest version of the Send Email action set for this purpose.