I have the same problem as sent to you by many Zoho mail users which is being unable to upload attachments to an email. I have provided a screenshot of the console. I have a MacBook Pro. 

I would appreciate that someone contacts me to sort this issue. 

I have tried to send an email with an attachment by phone and it worked.

Best regards,

Hesham Sharara

+201149955335

hsharara57@pureland-invest.com

hesham.sharara@gmail.com