Stuck when trying to load my kdbx File

[Lukas Karer]

await KdbxFormat().read(kdbxFileUInt8List, Credentials.composite(
ProtectedValue.fromString('password'), Uint8List.fromList(keyxFileUInt8List)));

This call is stuck, when i try to use it. Needed files exist, so it should be working.
Can someone of you help me guys?