I have recently published my first R package on CRAN and have now received the CRAN Package Check Results (see link below). The results show that my package causes errors for some Linux flavors. It is not trivial to address those errors since I cannot reproduce them on my computer. I can try to address the error messages but I cannot check whether my solution is successful other than by resubmitting my updated package to CRAN. I suppose the best way would be to have an upload page like the win-builder site that can be used to check for errors for different Linux flavors (https://win-builder.r-project.org). Does such a site exist? If not, what's the best way forward? Thank you.