FPackageSummary unable used to unpack uasset?!

[zbx911]

class FPackageSummary:
Name: FMappedName
SourceName: FMappedName
PackageFlags: int
CookedHeaderSize: int
NameMapNamesOffset: int
NameMapNamesSize: int
NameMapHashesOffset: int
NameMapHashesSize: int
ImportMapOffset: int
ExportMapOffset: int
ExportBundlesOffset: int
GraphDataOffset: int
GraphDataSize: int

def __init__(self, reader: BinaryStream) -> None:
    self.Name = FMappedName().read(reader)
    self.SourceName = FMappedName().read(reader)
    self.PackageFlags = reader.readUInt32()
    with suppress(ValueError):
        self.PackageFlags = EPackageFlags(self.PackageFlags)
    self.CookedHeaderSize = reader.readUInt32()
    self.NameMapNamesOffset = reader.readInt32()
    self.NameMapNamesSize = reader.readInt32()
    self.NameMapHashesOffset = reader.readInt32()
    self.NameMapHashesSize = reader.readInt32()
    self.ImportMapOffset = reader.readInt32()
    self.ExportMapOffset = reader.readInt32()
    self.ExportBundlesOffset = reader.readInt32()
    self.GraphDataOffset = reader.readInt32()
    self.GraphDataSize = reader.readInt32()

[MinshuG]

Can you share the traceback?