Hello Team,
I am using flow for my application in powerapps to send an email with attachment to the user. I am getting following error in workflow:

Here's my flow:

And here's my formula in powerapps:
TimeSheet_Week16.Run(Office365Users.MyProfile().Mail,Month_Year,"Hello,Please find attached for monthly timesheet. Thanks,",HtmlText1.HtmlText,Month_Year)
Can someone help me on this please?
Kind regards,
Naga