Email content missing in the mail


I have attempted to create this email almost 100 times using blank template. The preview is ok. But when I send example email, some or other content part is always missing.

After reading this support message disabled every plugin, ( Message Clipped ). Yet it is not working.

I have sent the example email to every email provider, so I am sure, the error is in the Mautic itself.

I want to send this email by Monday morning as I missed this week too. Can some body please suggest what is going wrong?

I think, the blank theme is only for text. If we add another text block it does not shows in mail.

For my mail, I have to add buttons between text, so any text after that button will not show.

I do not know why even image is not showing