numpy cannot find reference warnings

I installed numpy via anaconda, and while it runs fine, pycharm gives me tons of "cannot find reference" warnings. What's more I can't seem to disable the warnings. I can't add anything to "ignore references" under "inspections > Unresolved References": when I press apply the screen flashes and the list clears.

Any fix for this?

I'm running:

• personal version of Intellij 14.02 with pycharm extension 4.0 Beta 140.58
  
• numpy 1.9.1
  
• anaconda 3.7.4
  
• python 2.7.9