72930bc and 8ba756a won't open encrypted .paks - c63721b and older do open

[Maja-dev]

I've got a game (MotorTown) that has only one and the main .pak in the Paks folder but it doesn't want to open with 72930bc and 8ba756a. c63721b from 21st May is the last stable build where it opens. Any other build before that works as well.

This is what the log output has to say when trying to open the ...-Windows.pak that's greyed out and a red dot. This is happening to both 5.5 and 5.3 UE game builds each with their respectable mapping files.
[WRN] Could not load virtual paths, plugin manifest may not exist

[4sval]

set the game directory to the actual game directory where paks are, then the error will be much more explicit

[Maja-dev]

set the game directory to the actual game directory where paks are, then the error will be much more explicit

Deleted all the directories and set up a new one so it's Game/Content/Paks this time. Now these two builds are giving this output when trying to open the .pak.
[ERR] An encrypted archive has been found. In order to decrypt it, please specify a working AES encryption key
So I provide the AES key into Directory > AES, restart and it still shows the same message.

Downgrading to c63721b makes it work again using the same key

[LongerWarrior]

turns out this was CUE4Parse bug, due to an error in reading PakIndex
should be fixed in latest build, also there in enourmously big file Jeju_World.ubulk (9GB) which cause another issue while reading Jeju_World.umap

[Maja-dev]

Thank you for taking care of it. Much appreciated!