Email templates on CRM won't allow editing - gives error message: "Only 200,000 Characters allowed in Email"

Email templates on CRM won't allow editing - gives error message: "Only 200,000 Characters allowed in Email"

The message clearly has less than 200,000 characters. It has a Pdf attachment that is 2MB. I create the template and it works perfectly but as soon as I want to make a small change to the template I get that error message. This is the message: 

Hi ${Leads.First Name}

Thank you for connecting with me on LinkedIn and at the Blockchain event in Miami to discuss including your story in the Blockchain Innovation book. Let's get on a Zoom call next week and figure out what and where your story belongs in this project.

For inspiration about what you want to provide our designers, please look at our ebook library and page through the Miami book for cool examples. 

We will be launching the book with a party in May at the Blockchain summit in Orlando. Will send more detail on that later. 

Look forward to hearing from you.  

Exciting times ahead!



Cheers