Did you read the rest of the responses here in this thread?Yes, we have the same issue as well. What is the plan to fix?
Regarding the Everyplay expiration notice: 505 Games is aware of the error and is looking to sort it out. It has to do with the disabled Everyplay function. For now, just hit the "Okay" button and it shouldn't affect gameplay at all.
Regarding if you are crashing in a world: If it's consistent with the same worlds crashing each time, I'm sorry to say they are likely corrupted data files now and cannot be saved. These crashes are not related to the Everyplay expiration notice, and are likely due to interrupting the save process.
Hopefully, you've taken advantage of the extra save slots and manually made backups of those worlds before they were corrupted, explained here: Mobile Backup Instructions