Problem solved

Because of using deprecated API

Answer source: https://developer.apple.com/forums/thread/713814

if (@available(iOS 14.0, *)) {
        UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initForOpeningContentTypes:@[UTTypeData] asCopy:YES];
        documentPicker.delegate = self;
        [self presentViewController:documentPicker animated:YES completion:nil];
    } else {
        UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[(NSString *)kUTTypeData, (NSString *)kUTTypeText] inMode:UIDocumentPickerModeOpen];
        documentPicker.delegate = self;
        [self presentViewController:documentPicker animated:YES completion:nil];
    }