Unable to copy library book from ADE to Kobo ereader

I am unable to copy a library book that was downloaded to adobe digital editions library to my Kobo ereader.  I receive the message "Errors were detected.  The following item could not be copied to your device (name of book) and then E_10_Write - failed to write destination file.  I was able to copy two books a week ago on separate days but have not able to do so since November 26, 2020 when I tried to copy a library book to my ereader that I downloaded from the library.  Any help would be appreciated.  I have had my Kobo since 2011 and have never had a problem until now.