This means that you have to remove the unavailable packages from the list. It is normal that the package list will not match exactly between releases.
Let's use this example (you need to turn on the Advanced mode to see the list of packages requested):
Let's say that the upgrade complains about bind-dig not being available. You click the red 
near it, as well as near any other unwanted packages, and retry.
However, this will still leave you with the version of wpad linked against wolfssl - i.e. not the current recommendation of using mbedtls. You can either fix this manually, or just remove the bad wpad and add the good one to the package list.