rqpd promise already under evaluation: recursive default argument reference or earlier problems?

Question

I am trying to use the relatively new rqpd package developed by Roger Koenker and Stefan Bache in R. However, I encounter this error.

Here is a reproducible code: data("LaborSupply") fe.fit <- rqpd(lnwg ~ kids +age+disab|year, data=LaborSupply)

Error in rqpd(lnwg ~ kids + age + disab | year, data = LaborSupply) : promise already under evaluation: recursive default argument reference or earlier problems?

Could anybody point me towards my mistake?

I tried doing just one covariate, and using as.factor(year), also specifying lambda=0.5, but I still got the same error. I expect to get a regression summary table at the end.