Bug Reporting

Description

Provide a clear and concise description of the problem including warning and error messages.

Reproduction

Provide a clean R script demonstrating the issue with the necessary data files. Please include a minimal reproducible example (AKA a reprex). If you've never heard of a reprex before, start by reading https://www.tidyverse.org/help/#reprex.

Environment

Provide the following information:

• OS Type: [e.g., Linux, macOS, Windows]
• OS Version: [e.g., macOS 11.3, Windows 10, or Ubuntu 20.04]
• R Version: [e.g., 4.0, 4.1, or 4.2]
• Stan Backend: [e.g., rstan or cmdstanr]
• Version: [e.g., 0.0.3 or development]
• Source: [e.g., binary or source code]
• Repository: [e.g., CRAN, Bioconductor, GitHub, or Other]