Don't know how many have noticed but any function in GenomeInfoDb library (as well as ensembldb library) in R haven't been able to interact with UCSC servers what comes to mm10. Typical functions like Seqinfo(genome="mm10") return error Error in .order_seqlevels(chrom_sizes[, "chrom"]) : !anyNA(m31) is not TRUE
I confirmed this separately both in local machine and in cluster computing resource machines. This worked last Friday, but since Monday morning this no longer works. I guess someone at UCSC already knows this, but just in case no, does anybody know whom this might actually concern there?