You cant get rid of it for good especially if you are running a game with too many leagues/players/info and your pc cant take it.
To ensure it doesnt happen often:
1) Make sure you only load leagues that are necessary.
2) Go to preferences - match: untick show stadium and show scenery.
3) Search the net or even this forum with a search engine with the keywords "xml parsing error" - you will get instructions of how to find a particular folder that you should delete every time it happens (folder is called "1304" or summat).