Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - Enhanced Edition Stuck at final door (unfinished Investigating the Mines) - please HELP

Hi,
I know the game is pretty old yet it's my and my wife's recent discovery and it's super addictive .
Anyway - we're close to finish but we stuck at final DOOR. Seems like Investigating the Mines task didn't finish for some reason:

We collected Leandra's blood and created knight bane skillbook:

All team members learned Death knight bane:

Do you know how to unlock the door?

We don't want to go back in saves so far and redo everything again. Our saves can be found here:
https://easyupload.io/6ewfcb
The newest one is this:
"Kraniec Czasu - 116h35m" - we tried to mangle a bit with saves so if you click continue (in the game menu) it may load different save.
Is there any chance someone can help us with the issue? Is there any way to finish this quest?

Thanks in advance for any help!

Regards
KB

In case someone will have similar problem - thanks to larian support (huge kudos to them) I was able to move on. Seems like you need to use some of "Blood stones" (I had them in the inventory) to unlock rest of "End of time" portals. After that final door unlocked.

Regards
KB