@ramalhovictor96: You need to enable Private Messaging. This is in the "Edit Options" of the control panel. If this isn't there, it has to be added somehow. You can try posting in
https://www.mobileread.com/forums/sh...d.php?t=319819 to ask it to be enabled, or contact a moderator.
It is probably to late to work out what went wrong. A factory reset at the time might have gotten it working. But, if you have taken the card out and formatted it, you need the image to fix it.