We have saved our 'Lesson Matter' in word document.
Now we are 'copying and pasting' to (Moodle -Lesson) CONTENT PAGE.
Sometime it saves.
but sometimes it unable to save the page.
Showing following window.
As has been said many times in these forums it never is a good idea to copy text from your Word processor (especially MS Word) and paste it into the Moodle HTML editor. This is a sure way to bring all kind of hidden format code which will have unpredictable effects in Moodle.
Yes, plain text is OK. Then you can re-do the necessary formatting in Moodle's HTML text editor.