I am on the 1.1.8 game version. I have reloaded from a prior save point and went back again and again. I have validated file in Steam just in case.
I have tried with all 4 characters with the potion of flying and no mater where I'm standing or what "blue" ledge tile I click on, I get "No Path to Destination." I have seen video of fly working so I know its supposed to work. I have stood in the exact same spot as in the video and tried with all 4 characters. I went back a save and did it again with all 4 characters - nothing. I am unable to proceed with this quest.
Edit: Sent in my save as well.