posterior_predict() fails with newdata in version 2.21.4 for stan_glmer model objects

[MwalaLubinda]

Summary:

posterior_predict() fails with "newdata" argument. The issue is similar to issue #407

Description:

The error being returned is "! pwrssUpdate did not converge in (maxit) iterations"

Reproducible Steps:

If applicable, the steps required to reproduce the issue. If you have a reproducible example, please include it.

RStanARM Version:

The version of the rstanarm package you are running (e.g., from packageVersion("rstanarm"))

R Version:

The version of R you are running (e.g., from getRvegetRversion()rsion()`): 4.3.0

Operating System:

Your operating system: Windows x64