im trying to download that spesific library to make gene annotation but it gives me this warning. can somebody explain why and how can i fix it. Thanks.

if (!require("BiocManager", quietly = TRUE))

• install.packages("BiocManager")

BiocManager::install("illuminaHumanv4.db") Error: Bioconductor version cannot be validated; no internet connection? See #troubleshooting section in vignette

You got an error that said this:

Error: Bioconductor version cannot be validated; no internet connection? See #troubleshooting section in vignette

Which pointed you to the troubleshooting section of the vignette. Have you read that section? Did you try the things it says to try?