Error in gzfile(file, "wb"): cannot open the connection or compressed file

I'm trying to run two things: first, I'm creating a PDF with 4x5, ending with dev.off(), and then trying to create a new graph. However, after starting the second plot, I get:

Error in gzfile(file, "wb") : cannot open the connection
In addition: Warning message:
In gzfile(file, "wb") :
  cannot open compressed file '/var/folders/n9/pw_dz8d13j3gb2xgqb6rfnz00000gn/T/RtmpTfm1Ur/rs-graphics-822a1c83-b3fd-46c3-8028-4e0778f91d0c/4db4b438-ac35-403b-b791-e781baba152c.snapshot', probable reason 'No such file or directory'
Graphics error: Error in gzfile(file, "wb") : cannot open the connection

What is this error? The working directory is one I have read/write access to, and my hard drive isn't full.

Also, I'm using RStudio.