Cant make faces ... pls help

i saw a few other forums of this problem and “coplanar” was discussed but i dont think this is the case here cuz there are 2 random faces on the left side of my design while almost all the others have none. pls help i have been working on this for 3 hours and i want to be done . Screenshot (271)

Upload the SKP file so we can look at it. The screen shot doesn’t give enough information.

Paul.skp (1.2 MB)

Lack of planarity is indeed the problem. Connecting the corners diagonally fills in the faces.
Screenshot - 8_30_2017 , 7_02_16 PM
Paul.skp (36.4 KB)

ahh thank yoou! that was quick.

I also face this problem but after I left it.

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