Sounds like your freezer is not cold enough or there is way too much solvent.  24 hours should leave you with clear naphtha.  I would let it sit another day or two.  If it is still cloudy after another day you should evap some of the naphtha and try sticking it back in the freezer.

Telling us how much root bark you started with and how much solvent you used would be very helpful in troubleshooting your extraction.