Android 11 Saves dont working

Hello. I have been making an Android game on UE4 4.27 for a long time. The game has a save system, before (a month or two ago) it worked fine. But now the save file is simply not created when the game starts, the game code simply does not continue beyond the “Create save file” node. I know that in android 11 they changed the system for creating files and that each application now has its own memory. But I did not find a guide for working with this system. Can someone explain clearly or show a guide on how to make working saves?