Error in ggmap

Hello Dkahle,
I am trying to use ggmap, I tried the solutions you mentioned before but I am still getting this error

> la_county<-get_map('los angeles county')
Source : https://maps.googleapis.com/maps/api/staticmap?center=los%20angeles%20county&zoom=10&size=640x640&scale=2&maptype=terrain&language=en-EN&key=[AIzaSqDEtMrsaWkpzc9SL5ODOG4e4_odVSEzOTRE4]
Error in aperm.default(map, c(2, 1, 3)) :
invalid first argument, must be an array
In addition: Warning message:
In get_googlemap(center = location, zoom = zoom, maptype = maptype, :
HTTP 400 Bad Request

I downloaded the ggmap from CRAN because I tried Github and I am keep getting this error

Error: Failed to install 'ggmap' from GitHub:
(converted from warning) installation of package ‘C:/Users/zaina/AppData/Local/Temp/Rtmp2fPVHw/file3da85c997774/ggmap_3.0.0.902.tar.gz’ had non-zero exit status

Thanks a lot!
Zeinab