Travis build error - Githubissues

Travis build error during last checkin (it looks like a problem with R 3.6):
Setting up package cache
0.00s1.17sadding /home/travis/R/Library to cache
creating directory /home/travis/R/Library
R-session-info
R session information
$ Rscript -e 'sessionInfo()'
R version 3.6.0 (2017-01-27)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 14.04.5 LTS
Matrix products: default
BLAS:   /home/travis/R-bin/lib/R/lib/libRblas.so
LAPACK: /home/travis/R-bin/lib/R/lib/libRlapack.so
locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       
attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     
loaded via a namespace (and not attached):
[1] compiler_3.6.0
Installing package dependencies
Installing R packages: remotes
6.81s$ Rscript -e 'install.packages(c("remotes"));if (!all(c("remotes") %in% installed.packages())) { q(status = 1, save = "no")}'
Installing package into ‘/home/travis/R/Library’
(as ‘lib’ is unspecified)
Warning: unable to access index for repository https://cloud.r-project.org/src/contrib:
  cannot open URL 'https://cloud.r-project.org/src/contrib/PACKAGES'
Warning message:
package ‘remotes’ is not available (for R version 3.6.0) 
The command "Rscript -e 'install.packages(c("remotes"));if (!all(c("remotes") %in% installed.packages())) { q(status = 1, save = "no")}'" failed and exited with 1 during .
ropensci / datapack

Travis build error #107
