The error happens when the text for comments is copied from Word and pasted directly into the comments window. To avoid this problem, the best practice is to either type the comment directly in the window or follow these steps to copy/paste them:
  1. Copy the text from Word.
  2. In the comments window, click the Paste as Plain Text tool.User-added image
  3. Click OK in the popup window.User-added image
  4. Paste the comment text in the window.
  5. Format the text using the available tools.
  6. Save & Close.