Problem with send mail script

Hi,

I paste the script below in the formula block of my button and change email from and to

But i receive this error: "expected symbol:} at line 2 column 4 in this script"

Can you help me about this ?

Thanks

Script

sendEmail({
from: "recipient@domain.com",
to: "recipient@domain.com",
subject: "Hello World!",
text: "Some text",
attachments: files(this)
})