I would of thought that the PPA errors could not be obtained as they could possibly be outdated or some other issue as they cannot be located.
According to this website you can fix these errors by using
sudo gedit /etc/apt/sources.list to edit the sources list file. Once you are in the sources file you can search for the PPA sources and check if they have been setup incorrectly for some reason.
If this fails you can also try
cd /etc/apt/sources.list.d and then check the individual files from there using a text editor (I prefer using
nano for this).
I have not used these methods before so I am not too sure if they would fix your problem. These methods seem like they will just check if someone has done some editing to the sources or added the sources incorrectly, I am not too sure what else you could do to fix the problem if the above methods fail.
I hope these suggestions help you.