I tested it on a new project and also no luck.
But I did get the error in another plugin, In another project I just upgraded to 5.01 … also was returning the same error.
So I assumed it was the unreal engine itself, just verified the files and it reinstalled the engine after finding a corruption.
Now things seem to package like normal again.
Thanks for the assistance, and apologies if this wasted your time.
Hopefully someone else who runs into this can find the solution as well.
My engine must have corrupted on the update.