old worlds won’t load

I stopped playing the game for awhile now when I came back to it after the new update none of my old worlds will load. when i press on them the game goes to load them then crashes, if i try to edit it it loads the edit screen for a second then closes. i’ve tried uninstalling but i can only play the new worlds i made still cant access any of my old ones. this has been happening for a few months now. i have a lot of old worlds with hours and hours of work put into them but i have no way of accessing them.