Can someone please explain what this LastCrash txt means

So have you tried without to find out if those are causing issues ? Maybe you have some conflicts or outdated mods in your game.

Custom content can get outdated with patches. If it works when you remove your mods folder, then one or more mods/cc is no longer compatible with the game and you have to find those.

Use the 50/50 method: http://modthesims.info/wiki.php?title=Game_Help:Finding_Problem_Custom_Content