Hi,
not an issue, just a notice of compatibility LISE 1.3.1 ->LISE 1.4.x.
If you edit an item after updating LISE you may sometimes get an error report such as "invalid item url" and you will not able to save the item.
This error may be related to the new feature "Hide URL field from item editor".
If you activate this function in instances which are originary created before LISE 1.4.2, you may see this error. Just deactivate the "hide-URL" function and you can edit the item again.
LISE 1.4.2 invalid item url after update
Re: LISE 1.4.2 invalid item url after update
Here's this bug description and hardcoded solution.
http://dev.cmsmadesimple.org/bug/view/12387
http://dev.cmsmadesimple.org/bug/view/12387