Not 100% sure, but this "should" fix it. I would test it, but I'm at work.
URestrict/lua/ULib/modules/URestrict.lua Line:12
ur.limit = { ["props"] = {}, ["npcs"] = {}, ["vehicles"] = {}, ["ragdolls"] = {}, ['sents'] = {} }
Change the above line to read:
ur.limit = { ["props"] = {}, ["npcs"] = {}, ["vehicles"] = {}, ["ragdolls"] = {}, ['sents'] = {}, ['effects'] = {} }