Problems with attaching PDF to Outlook email

I have never had this problem before. I have Windows 11 now installed on my computer. I try to attach a PDF to my Outlook email. Instead of showing it as an attachment at the top of the email, it is now found at the bottom of the email with a message like this:

I'm using Adobe Acrobat.
Here's the xxx.pdf for you to view.

I don't like the location, but I can live with it. But if my email includes a reference to an attachment, when I go to send it, I get this message. "You may have forgotten to attach a file."  it gives me two options: "Don't send" or "send anyway." 

I also have been having problems where it won't let me send it at all, telling me that changes have been made and I can't send the email without creating a new one. 

Very frustrating.