Hello,
I can't continue the main tribunal quest because I have a constant CTD at the loading when I go to Plaza Brindisi Dorom after being advised of the attack, no matter the door i use to access the plaza. I tried to use the console to load the cell and it CTD too. I also tried to complete the quest with console and I still can't access the plaza. Teleporting to the dwemer ruins crashes too.
Here's my mod list, sorted by LOOT (I tried to activate only morroblivion (v066) but nothing has changed....)
00 Oblivion.esm
01 Morrowind_ob.esm
02 FastLOD.esm
03 DLCShiveringIsles.esp
04 Knights.esp
05 Morrowind_ob.esp
06 Morrowind_ob - UCWUS.esp
07 Morrowind_ob - MorroblivionTreeReplacer.esp
08 ClothingReplacer.esp
09 Faster Level Up x5.esp
0A Oblivion_Character_Overhaul.esp [Version 2.0]
0B Dagger Galore Patch.esp
0C Morrowind_ob - Conversation.esp
0D Morrowind_ob - Chargen and Transport Mod.esp [Version 13]
0E Morrowind_ob - Classic Creatures Re-Enabled.esp
0F Morrowind_ob - Morroblivion Maps.esp
If anyone can help or have any idea, I would be very grateful.
See ya...

See if this plugin helps...
It worked.
Thank you very much
How do you install this plugin? Highlight drag and drop? cause thats not working for me.
The above plugin is apart of Dagger Galore
Hmm? I already have that patch it looks like. I keep crashing in the same spot described above tho. Im not sure why it keeps crashing then.
I also have Daggers Galore, but cannot enter the plaza during the Attack on Mournhold quest from any door. Instant crash. I even set the quest to completed and tried to go in, still failed. I was able to go there before the start of this quest so I know the two are tied.
Ok, just tried coc MournholdVSPlazaSBrindisiSDorom34 to try and see if I could at least teleport to it. CTD.
I had the same problem, exactly as you described. I'm running version 0.66 with no extra mods. I tried everything to advance the quest, but nothing worked. Sucks too, because out of the entire remake, this was the part I was looking forward to seeing with the Oblivion graphics.
After the issues near the end of Bloodmoon, this one was too much, I ended up giving up and uninstalling it.