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assistance needed

hello all
this is a house i am working on for a school project and i am not sure how to solve the errors if anyone can assist please comment your email and i will give access.
thank you
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We can't hardly see anything in a file without acess. If you want someone from the com unity to analyse, best chance to get support is to make it public. By first bet is you tried to make a few non-manifold solids (slabs that only touch in one point or one edge without really being one volume).
Which errors? or what are you having trouble with?
Looks like something go deleted. Extrude 23 is missing a face to extrude. If you find extrude 23 and double click on it, then click on "missing face", you can then define the face you're trying to extrude. It also looks like sketch 17 referenced whatever got deleted also,
I'm seeing a ton of features. And none of them are named. I can't really guess your intent.
What I recommend is you have one sketch for each floor, Then extrude faces according to the height of your walls, counters, whatever using a different extrude for each height. Then create a plane for the next floor, then sketch the 2nd floor plan and extrude just like with the 1st floor.