Email function not working for Mac (Mail app)

Hi, my boss recently upgraded his computer to a Macbook Pro and no longer is able to email pdfs from his computer. He is using the default Mail app. 

I had him go into his settings and make sure that Mail is set as his default mail client. When he tries sending the email he gets this message "An error occurred while trying to create a mail document. Adobe Acrobat is unable to complete your request."

He has the latest version of Adobe and his OS is updated as well. Any other suggestions?