I had the "not working" problem, too
( BUT: on another whistle )
There, I tried to scale up to 125%, and this worked there very well
( scale up means, that the details worked out by the 3dprinter turn out better, in scale )
and : try print with 0.1mm layer
and : print it slloooowwww (20mm/sec, 50mm/s^2)
often helps A LOT
please send some feedback,...whether it worked or not !