fable, tsibble, ggplot2, the Legend Key on the RHS fails to map forecast interval levels to fill aesthetics, defaulting to black

Hi Rob,

Thanks for the reply.

I have fresh installed R, Rtools, RStudio, and the latest package versions on CRAN that I require.

Black legend keys on the RHS.

> sessioninfo::session_info()
─ Session info ────────────────────────────────────────────────────────────────────────────────────────────────────
 setting  value
 version  R version 4.5.1 (2025-06-13 ucrt)
 os       Windows 11 x64 (build 26100)
 system   x86_64, mingw32
 ui       RStudio
 language (EN)
 collate  English_United Kingdom.utf8
 ctype    English_United Kingdom.utf8
 tz       Europe/London
 date     2025-09-13
 rstudio  2025.09.0+387 Cucumberleaf Sunflower (desktop)
 pandoc   NA
 quarto   ERROR: Unknown command "TMPDIR=C:/Users/achan/AppData/Local/Temp/Rtmp4AwRFk/file22b42e2e2048". Did you mean command "install"? @ C:\\Users\\achan\\AppData\\Local\\Programs\\Quarto\\bin\\quarto.exe

─ Packages ────────────────────────────────────────────────────────────────────────────────────────────────────────
 package        * version date (UTC) lib source
 anytime          0.3.12  2025-07-14 [1] CRAN (R 4.5.1)
 cli              3.6.5   2025-04-23 [1] CRAN (R 4.5.1)
 digest           0.6.37  2024-08-19 [1] CRAN (R 4.5.1)
 distributional   0.5.0   2024-09-17 [1] CRAN (R 4.5.1)
 dplyr            1.1.4   2023-11-17 [1] CRAN (R 4.5.1)
 ellipsis         0.3.2   2021-04-29 [1] CRAN (R 4.5.1)
 fable          * 0.4.1   2024-11-05 [1] CRAN (R 4.5.1)
 fabletools     * 0.5.1   2025-09-01 [1] CRAN (R 4.5.1)
 farver           2.1.2   2024-05-13 [1] CRAN (R 4.5.1)
 feasts           0.4.2   2025-08-27 [1] CRAN (R 4.5.1)
 generics         0.1.4   2025-05-09 [1] CRAN (R 4.5.1)
 ggdist           3.3.3   2025-04-23 [1] CRAN (R 4.5.1)
 ggplot2        * 4.0.0   2025-09-11 [1] CRAN (R 4.5.1)
 glue             1.8.0   2024-09-30 [1] CRAN (R 4.5.1)
 gtable           0.3.6   2024-10-25 [1] CRAN (R 4.5.1)
 labeling         0.4.3   2023-08-29 [1] CRAN (R 4.5.0)
 lattice          0.22-7  2025-04-02 [2] CRAN (R 4.5.1)
 lifecycle        1.0.4   2023-11-07 [1] CRAN (R 4.5.1)
 lubridate        1.9.4   2024-12-08 [1] CRAN (R 4.5.1)
 magrittr         2.0.4   2025-09-12 [1] CRAN (R 4.5.1)
 nlme             3.1-168 2025-03-31 [2] CRAN (R 4.5.1)
 pillar           1.11.0  2025-07-04 [1] CRAN (R 4.5.1)
 pkgconfig        2.0.3   2019-09-22 [1] CRAN (R 4.5.1)
 progressr        0.15.1  2024-11-22 [1] CRAN (R 4.5.1)
 purrr            1.1.0   2025-07-10 [1] CRAN (R 4.5.1)
 R6               2.6.1   2025-02-15 [1] CRAN (R 4.5.1)
 RColorBrewer     1.1-3   2022-04-03 [1] CRAN (R 4.5.0)
 Rcpp             1.1.0   2025-07-02 [1] CRAN (R 4.5.1)
 rlang            1.1.6   2025-04-11 [1] CRAN (R 4.5.1)
 rstudioapi       0.17.1  2024-10-22 [1] CRAN (R 4.5.1)
 S7               0.2.0   2024-11-07 [1] CRAN (R 4.5.1)
 scales           1.4.0   2025-04-24 [1] CRAN (R 4.5.1)
 sessioninfo      1.2.3   2025-02-05 [1] CRAN (R 4.5.1)
 tibble           3.3.0   2025-06-08 [1] CRAN (R 4.5.1)
 tidyr            1.3.1   2024-01-24 [1] CRAN (R 4.5.1)
 tidyselect       1.2.1   2024-03-11 [1] CRAN (R 4.5.1)
 timechange       0.3.0   2024-01-18 [1] CRAN (R 4.5.1)
 tsibble        * 1.1.6   2025-01-30 [1] CRAN (R 4.5.1)
 urca             1.3-4   2024-05-27 [1] CRAN (R 4.5.1)
 vctrs            0.6.5   2023-12-01 [1] CRAN (R 4.5.1)
 withr            3.0.2   2024-10-28 [1] CRAN (R 4.5.1)

 [1] C:/Users/achan/AppData/Local/R/win-library/4.5
 [2] C:/Program Files/R/R-4.5.1/library
 * ── Packages attached to the search path.

───────────────────────────────────────────────────────────────────────────────────────────────────────────────────
Warning message:
In system2("quarto", "-V", stdout = TRUE, env = paste0("TMPDIR=",  :
  running command '"quarto" TMPDIR=C:/Users/achan/AppData/Local/Temp/Rtmp4AwRFk/file22b42e2e2048 -V' had status 1

As an aside do you know how to resolve the quarto and pandoc error(s)?

 pandoc   NA
 quarto   ERROR: Unknown command "TMPDIR=C:/Users/achan/AppData/Local/Temp/Rtmp4AwRFk/file22b42e2e2048". Did you mean command "install"? @ C:\\Users\\achan\\AppData\\Local\\Programs\\Quarto\\bin\\quarto.exe
Warning message:
In system2("quarto", "-V", stdout = TRUE, env = paste0("TMPDIR=",  :
  running command '"quarto" TMPDIR=C:/Users/achan/AppData/Local/Temp/Rtmp4AwRFk/file22b42e2e2048 -V' had status 1

For normal legend keys on the RHS, and to not display quarto errors, but it still says pandoc NA, I have had to install the following versions :

remotes::install_version("sessioninfo", "1.2.2")
pak::pak("ggplot2@3.5.2")
> sessioninfo::session_info()
─ Session info ────────────────────────────────────────────────────────────────────────────────────────────────────
 setting  value
 version  R version 4.5.1 (2025-06-13 ucrt)
 os       Windows 11 x64 (build 26100)
 system   x86_64, mingw32
 ui       RStudio
 language (EN)
 collate  English_United Kingdom.utf8
 ctype    English_United Kingdom.utf8
 tz       Europe/London
 date     2025-09-13
 rstudio  2025.09.0+387 Cucumberleaf Sunflower (desktop)
 pandoc   NA

─ Packages ────────────────────────────────────────────────────────────────────────────────────────────────────────
 package        * version date (UTC) lib source
 anytime          0.3.12  2025-07-14 [1] CRAN (R 4.5.1)
 cli              3.6.5   2025-04-23 [1] CRAN (R 4.5.1)
 digest           0.6.37  2024-08-19 [1] CRAN (R 4.5.1)
 distributional   0.5.0   2024-09-17 [1] CRAN (R 4.5.1)
 dplyr            1.1.4   2023-11-17 [1] CRAN (R 4.5.1)
 ellipsis         0.3.2   2021-04-29 [1] CRAN (R 4.5.1)
 fable          * 0.4.1   2024-11-05 [1] CRAN (R 4.5.1)
 fabletools     * 0.5.1   2025-09-01 [1] CRAN (R 4.5.1)
 farver           2.1.2   2024-05-13 [1] CRAN (R 4.5.1)
 feasts           0.4.2   2025-08-27 [1] CRAN (R 4.5.1)
 generics         0.1.4   2025-05-09 [1] CRAN (R 4.5.1)
 ggdist           3.3.3   2025-04-23 [1] CRAN (R 4.5.1)
 ggplot2        * 3.5.2   2025-04-09 [1] CRAN (R 4.5.1)
 glue             1.8.0   2024-09-30 [1] CRAN (R 4.5.1)
 gtable           0.3.6   2024-10-25 [1] CRAN (R 4.5.1)
 labeling         0.4.3   2023-08-29 [1] CRAN (R 4.5.0)
 lattice          0.22-7  2025-04-02 [2] CRAN (R 4.5.1)
 lifecycle        1.0.4   2023-11-07 [1] CRAN (R 4.5.1)
 lubridate        1.9.4   2024-12-08 [1] CRAN (R 4.5.1)
 magrittr         2.0.4   2025-09-12 [1] CRAN (R 4.5.1)
 nlme             3.1-168 2025-03-31 [2] CRAN (R 4.5.1)
 pillar           1.11.0  2025-07-04 [1] CRAN (R 4.5.1)
 pkgconfig        2.0.3   2019-09-22 [1] CRAN (R 4.5.1)
 progressr        0.15.1  2024-11-22 [1] CRAN (R 4.5.1)
 purrr            1.1.0   2025-07-10 [1] CRAN (R 4.5.1)
 R6               2.6.1   2025-02-15 [1] CRAN (R 4.5.1)
 RColorBrewer     1.1-3   2022-04-03 [1] CRAN (R 4.5.0)
 Rcpp             1.1.0   2025-07-02 [1] CRAN (R 4.5.1)
 rlang            1.1.6   2025-04-11 [1] CRAN (R 4.5.1)
 rstudioapi       0.17.1  2024-10-22 [1] CRAN (R 4.5.1)
 scales           1.4.0   2025-04-24 [1] CRAN (R 4.5.1)
 sessioninfo      1.2.2   2021-12-06 [1] CRAN (R 4.5.1)
 tibble           3.3.0   2025-06-08 [1] CRAN (R 4.5.1)
 tidyr            1.3.1   2024-01-24 [1] CRAN (R 4.5.1)
 tidyselect       1.2.1   2024-03-11 [1] CRAN (R 4.5.1)
 timechange       0.3.0   2024-01-18 [1] CRAN (R 4.5.1)
 tsibble        * 1.1.6   2025-01-30 [1] CRAN (R 4.5.1)
 urca             1.3-4   2024-05-27 [1] CRAN (R 4.5.1)
 vctrs            0.6.5   2023-12-01 [1] CRAN (R 4.5.1)
 withr            3.0.2   2024-10-28 [1] CRAN (R 4.5.1)

 [1] C:/Users/achan/AppData/Local/R/win-library/4.5
 [2] C:/Program Files/R/R-4.5.1/library