error: sample size calculation for two sample t test using pwr

[love4donut]

pwr.t.test(n=NULL, d=7, sig.level = 0.05, power=0.8)
Error in uniroot(function(n) eval(p.body) - power, c(2 + 1e-10, 1e+09)) :
f() values at end points not of opposite sign

pwr.t.test(n=NULL, d=7, sig.level = 0.01, power=0.8)

 Two-sample t test power calculation 

          n = 2.44337
          d = 7
  sig.level = 0.01
      power = 0.8
alternative = two.sided

NOTE: n is number in each group