cannot create new worlds, convert old worlds and all my saves have been deleted

if I convert an old world from Minecraft ps4 edition it always fails and whenever I create a new world it gives me the error "cannot load world", all my worlds in the latest update have been deleted aswell.

whenever I try and exit out the failure to load world error nothing happens and I have to close the application to get past it.

here is a link showing the issue
https://youtu.be/Pk9iqpA80do