well 
I just made a fool of myselfâŠ
the reason why the staircase is invisible: check my âbuilding visionâ
but⊠why is the upper part of the road hidden und the lower part not?
itâs both âroadâ and not âslabâ so it should either not be hidden or all of it 
edit:
aaaand I got another oneâŠ
I forgot that this template has an unsloped 1 heigh roof so they didnât finish it (see problem here)
so I modified it to a sloped 1 heigh roof and they started to work on it again
BUT: they removed all the scaffolding first just to rebuild it again throwing lots of these errors in the process
