About a month ago, my code for running “loo” on a model created using the BRMS function worked just fine, but now I am getting an error:
(loo1 <- loo(fit1))
Error: ‘loo.default’ is not implemented yet
There is no issue with the models themselves as far as I can tell. I have tried updating brms, rstan, loo, R, and RStudio. I also updated my operating system to Catalina (working with a Mac). The same error message came up before and after these updates.
Thanks in advance for any help!