Okay... I hope I'm not copying anyone's post...
It concerns Valygar's hunt mission. When I'm entering his hut, he asks me whether I was hired my mages. If I choose the option "Yes, they hired us, but they didn't tell me about this" (or something like that), the conversation suddenly ends with a text: "there are no valid dialog lines". Then, of course, I cannot add him into party nor end his quest... Other options seem to be unaffected.
I'm using original BG2+ToB with mods:
1) Almateria Restoration Project v8.2.8 - entire mod
2) Unfinished Business v26 - entire mod
3) Tweak Anthology v4 (former BG2 Tweak Pack) - only four modifications: dialogues cause pauses, silent "gather your party", Jaheira's alignment good neutral, Korgan's alignment neutral evil.
My WeiDU.log:
// Log of Currently Installed WeiDU Mods
// The top of the file is the 'oldest' mod
// ~TP2_File~ #language_number #component_number // [Subcomponent Name -> ] Component Name [ : Version]
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #0 // Restored Locations: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #1 // Restored Characters and Dialogs: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #2 // Restored Sounds: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #3 // Restored Items: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #4 // Restored Wish Options: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #5 // Restored XP for Minor Things: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #6 // Lich Deril: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #7 // Restored Random Encounters: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #8 // Minor Restorations: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #10 // Better Item Import: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #11 // Restored Final Slayer Dream: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #12 // Alternate Slayer Change: v8.2.8
~ARESTORATIONP/SETUP-ARESTORATIONP.TP2~ #0 #13 // Restored Waukeen's Promenade Cutscene: v8.2.8
~UB/SETUP-UB.TP2~ #2 #0 // Porwanie Boo zrobione przez Cliffette: v26
~UB/SETUP-UB.TP2~ #2 #1 // Relacje Suna Seni i Valygara: v26
~UB/SETUP-UB.TP2~ #2 #2 // Kalah i To Co Bylo Mu Obiecane: v26
~UB/SETUP-UB.TP2~ #2 #3 // "Kot i mysz" (Bodhi poluje na ciebie w Czarowiezach) zrobione przez Ghreyfain: v26
~UB/SETUP-UB.TP2~ #2 #4 // Gorje Ciemne Wzgórze i rozszerzone poszukiwania Ilitu: v26
~UB/SETUP-UB.TP2~ #2 #5 // Pai'Na/Zbuga pająka - rozszerzona przygoda: v26
~UB/SETUP-UB.TP2~ #2 #6 // Ulepszona tawerna Pod Krzywym Zurawiem: v26
~UB/SETUP-UB.TP2~ #2 #7 // Przywrócone losowe spotkania w mieście: v26
~UB/SETUP-UB.TP2~ #2 #8 // Artemis Entreri w Siedzibie Bodhi: v26
~UB/SETUP-UB.TP2~ #2 #9 // Poprawione "Stworzenia Xzara": v26
~UB/SETUP-UB.TP2~ #2 #10 // Przywroceni Piekielni Sludzy, autorstwa SimDing0: v26
~UB/SETUP-UB.TP2~ #2 #11 // Poprawaka dla Gorfa, autorstwa Gebhard Blucher: v26
~UB/SETUP-UB.TP2~ #2 #12 // Przywrócone przedmioty: v26
~UB/SETUP-UB.TP2~ #2 #13 // Oryginalny portret Yoshimo: v26
~UB/SETUP-UB.TP2~ #2 #14 // Oryginalny portret Anomena: v26
~UB/SETUP-UB.TP2~ #2 #15 // Przywrocone portrety NPC: v26
~UB/SETUP-UB.TP2~ #2 #16 // Poprawione BAMy i Skrypty: v26
~UB/SETUP-UB.TP2~ #2 #17 // Poprawione imiona bohaterow: v26
~UB/SETUP-UB.TP2~ #2 #18 // Przywrocone pomniejsze dialogi: v26
~UB/SETUP-UB.TP2~ #2 #19 // Przywrocone Moce Bhaala, autorstwa David Gaider: v26
~UB/SETUP-UB.TP2~ #2 #20 // Rozszerzone opisy przedmiotow z ToB: v26
~UB/SETUP-UB.TP2~ #2 #21 // Pomniejsze przywrocenia do Tronu Bhaala: v26
~UB/SETUP-UB.TP2~ #2 #22 // Podklasa Smialka: v26
~UB/SETUP-UB.TP2~ #2 #23 // Podklasa Dzikusa: v26
~UB/SETUP-UB.TP2~ #2 #24 // Wyrzuty Sumienia Sarevoka: v26
~UB/SETUP-UB.TP2~ #2 #25 // The Murder of Acton Balthis, by Kulyok: v26
~CDTWEAKS/SETUP-CDTWEAKS.TP2~ #6 #130 // Wszystkie dialogi zatrzymuja gre: v4
~CDTWEAKS/SETUP-CDTWEAKS.TP2~ #6 #3060 // Usun dzwiek "Przed wyruszeniem w droge nalezy zebrac druzyne." (Weimer): v4
~CDTWEAKS/SETUP-CDTWEAKS.TP2~ #6 #4050 // Zmien charakter Jaheiry na Neutralny dobry: v4
~CDTWEAKS/SETUP-CDTWEAKS.TP2~ #6 #4100 // Zmien charakter Korgana na Neutralny zly: v4
I'll be glad if you would help me (if it's mine mistake) or fix it (if it's a mod's bug)...