“This message cannot be displayed…”
My fix for, “This message cannot be displayed because of the way it is formatted”. In the body of text “select all”. Instead of “cut” “copy” or “replace” tap the arrow >. Tap BIU (for bold, italics, underline) and choose one. I choose italics. Important, then tap the subject line to escape the select all format.!
I have IPhone SE email.
iPhone SE (Gen 3)