If this message appears after you've filled out your crossword, it means that there is at least one word in your grid that is incorrect. To close the pop-up message, click or tap on the X located in the top right corner.
If you'd like to see which cells are incorrect, select Check from the top menu and turn Autocheck on. When Autocheck is on, any incorrect letters will be highlighted on your puzzle.
Once you identify the incorrect letters, select Reveal from the top menu and use either Reveal Letter or Reveal Word for help on solving that part of your puzzle.
We hope this helps explain why your puzzle was not solved.