Thank you for your comment, Soe Htike. You’ve raised a good point regarding the R version affecting the installation and functionality of INLA. I might have used a different R version when I prepared the materials, which could explain why I didn’t encounter this issue.
For those experiencing similar issues, the command provided on the INLA website can be very helpful. Soe Htike, your shared command for installing INLA for R is also beneficial for classmates!