R CMD check found ERRORs

LaTeX failed to compile springer_article.tex. See https://yihui.org/tinytex/r/#debugging for debugging tips. See springer_article.log for more info.

Process completed with exit code 1.

Input 'save-always' has been deprecated with message: save-always does not work as intended and will be removed in a future release. A separate `actions/cache/restore` step should be used instead. See https://github.com/actions/cache/tree/main/save#always-save-cache for more details.

LaTeX Warning: Command `\thepart' already defined -- not changed on input line 978.

LaTeX Warning: Command `\thesection' already defined -- not changed on input line 979.

LaTeX Warning: Command `\thesubsection' already defined -- not changed on input line 980.

LaTeX Warning: `h' float specifier changed to `ht'.

LaTeX Warning: `h' float specifier changed to `ht'.

Package soulutf8 Warning: This package is obsolete,

(soulutf8) use the soul package directly.

(soulutf8) on input line 29.