Unexpected character '64' found when expecting key

[westfoxtrot]

In Log

19:30:50.166816 - ERR: Exception when performing local update.
Depressurizer.ParseException: Unexpected character '64' found when expecting key.
at Depressurizer.VdfFileNode.LoadFromBinary(BinaryReader stream, Int64 streamLength)
at Depressurizer.VdfFileNode.LoadFromBinary(BinaryReader stream, Int64 streamLength)
at Depressurizer.PackageInfo.LoadPackages(String path)
at Depressurizer.GameList.UpdateGameListFromOwnedPackageInfo(Int64 accountId, SortedSet`1 ignored, AppTypes includedTypes, Int32& newApps)
at Depressurizer.FormMain.UpdateLibrary()