problem in precis command

[nilton-brasil]

Trying to reproduce Mcelreath(2016, Statistical Rethinking, pp. 97-99) when I use the precis command with corr=TRUE parameter there is no difference without the parameter. It does not show the correlation among models parameters. I have tried to solve uninstalling and reintalling again rethinking package but it did not work. Thank you for your great work. Best regards, Nilton.