Email automation not working please help lol

Good afternoon, 

I was wondering if someone could please help me with this - I'm an excel novice and have put together code to extract data from 4 separate cells and bring it into an outlook email for me. I thought I'd done it correctly but every time I try to trigger the mails I get the 424 error object required and my 'objMail.Body' entire section is highlighted in yellow - would anyone be able to help at all please? I can also post the spreadsheet that I'm trying to use too. 

Code I've put together is below - 

And the spreadsheet format looks like this with 25 cells per column -

With the Email Addresses kept on a separate tab. 

Many thanks in advance for any help!