Same problem.
I have three parties -
First one locked up on 5-3 Victory Screen because Amiri doesn't have an ability to pick
Second one locked up on 1-5 Victory Screen - here there is no indication on what to select, no abilities... just the 5 characters sitting there unable to advance on
Third party (made after the first two locked up), locked up on 3-4 Victory Screen - For this group, the above "random picture mashing" technique that Zyxion worked and fixed the problem.
I have been in contact with Obsidian support and they said they are working on a big patch coming out "soon". Hopefully it fixes the problem.
Great game, lots of fun when it works, but right now the bugs are sinking it for me.
BC