Hi @Dillan J,
I was able to import your .dwg file into a model. I had to be patient as it took a while to load (around 10 minutes, I just got other things done), but once in, it works fine. You have to be patient and let FlexSim work on importing it, even though FlexSim is totally unresponsive during that time.

One reason that it takes a long time to load is the 3D objects that are included in the .dwg. I'm guessing they have an extremely high polygon count, and thus slow down the importing and drawing of the layout. I have highlighted them with red boxes in the screenshot above.
If you open the .dwg file in your CAD software and remove those 3D objects - the orange machines, red spirals, and black text box - you will likely have much greater success importing and using the drawing in FlexSim.
It's possible that your computer needs upgraded graphics drivers to properly show the drawing, or your computer may be slower loading the file than my computer. But in either case, simplifying or removing the 3D geometry in the drawing file will most likely fix the issue.
I've attached the model where I imported your drawing file. It also takes my PC around 10 minutes to load this model (due to the drawing), but once loaded, my graphics card handles it fine with a decent refresh rate (I do have a pretty beefy graphics set up, so if your graphics hardware is older or weaker, the experience might not be adequate).
Let us know if you're able to simplify the drawing and how it goes for you.
dwglayout.fsm