I am currently setting up Github actions via usethis and everything works on Windows and macOS and Ubuntu-16.04 but and I am running into problems und ubuntu >= 18.04. rcmdcheck fails when trying to build the vignettes of the package with this error:
unable to load shared object '/home/runner/work/_temp/Library/stringi/libs/stringi.so': libicui18n.so.55: cannot open shared object file: No such file or directory
Which sounds to me like stringi was not correctly installed from source? But I have no idea how to check/fix this as this is my first time working with github actions.
Thanks for any pointers!