computational error in lmerTest even with ham-data

Question

lmerTest did not return p-values of my own model; so I tried to reproduce the example from the manual -

m <- lmer(Informed.liking ~ Gender+Information+Product +(1|Consumer), data=ham)
# gives summary of lmer object. The same as of class merMod but with
# additional p-values calculated based on Satterthwates approximations

summary(m)

but even then get the message:

summary from lme4 is returned
some computational error has occurred in lmerTest

and no p-values! What´s wrong?

Thx in advance!