I have just completed the upgrade to 14 from 13 using the upgrade module. The UCP module load failed because of missing modules pm2 and certman, but the system came back fine with just an error message about UCP.
However, in the module admin tab, I was no longer able to expand each module to see info and select options (upgrade/noupgrade)
I manually installed pm2 and certman, and then upgraded UCP, hoping that this would resolve the problem, however the problem still exists.
There is a workaround to select download all, and then work through the list.
I think that this is a JS issue related to bootstrap-select - the console showed that bootstrap-select.js.map was missing.
It is not a showstopper, but any suggestions on how to address this would be appreciated - it could be that there are other related issues still to be found!