insufficient permission for image extraction on my own files

[#1]

I am using acrobat DC on a MacBook Pro running Catalina. I have flattened and secured my files with a password on Acrobat, of course. When I try to export as an image (in any format) I get an insufficient permissions dialogue box. It's my file!! I gave it the password! What am I doing wrong? 

JR

[#2]

I am using acrobat DC on a MacBook Pro running Catalina. I have flattened and secured my files with a password on Acrobat, of course. When I try to export as an image (in any format) I get an insufficient permissions dialogue box. It's my file!! I gave it the password! What am I doing wrong? 

JR

[#3]

I too am getting this error. Have you received a reply?

[#4]

Remove the password security, then save the file under a new name, re-open it and try it again.