Hi FrankM,
Please try the way below
1. Open file \cuteeditor_files\include_CuteEditor.php
2. Find section below
$s=$s."<span val='".$v."' html='".$h."' txt='".$t."'></span>";
3. Change it to
$s=$s."<span val=\"".$v."\" html='".$h."' txt='".$t."'></span>";
Regards,
Ken