There are two errors happening.
Assuming all the resources are available and the workers don't build, unless the code is evolving and the workers went on strike that is an error too.
The other error, then I have a question for you.
Does the dust stay after restarting the game?
I had a similar problem, but after restarting the dust went away.
Also, do you get any error dialogue (red text in a small windowed pop-up in game), because that would be important for staff to help I think.
From my perspective, I think it is a glitch with something due to an error of the thing getting corrupted or some such. I would try loading, if available, a previous save and if possible, either seeing if the construction continues (sometimes from experience this works for that problem) and if not, then try to demolish the building again, maybe it will work that time round.
I think that the error is caused by the not building error, which acts as a catalyst.
Hope this resolves your problem - I'm sure someone else will come up with a better or more technical solution soon enough.
p.s. nice specs !