Hello! First of all, sorry for lifting up an old post. I just feel like answering to this since I had exactly the same problem and the answer in the end was rather simple.
It occured to me that the error happened because some of the files had not been installed with the KonaKart installer. For example I ~KonaKart\webapps\konakartadmin\WEB-INF\lib folder there were only a few files. I downloaded the zip with all konakart files and noticed that I was missing like 20 jar files from that folder! After moving those in, "SEVERAL: Failure in context start [/konakartadmin] due to previous errors" error stopped existing and I was able to get into konakartadmin page.
So the answer is downloading the KonaKart Multi-platform zip package from http://www.konakart.com/downloads/community_edition and then extracting it to your konakart folder without overwriting any files. That should give you all the missing files.
Regards, Artsu
It occured to me that the error happened because some of the files had not been installed with the KonaKart installer. For example I ~KonaKart\webapps\konakartadmin\WEB-INF\lib folder there were only a few files. I downloaded the zip with all konakart files and noticed that I was missing like 20 jar files from that folder! After moving those in, "SEVERAL: Failure in context start [/konakartadmin] due to previous errors" error stopped existing and I was able to get into konakartadmin page.
So the answer is downloading the KonaKart Multi-platform zip package from http://www.konakart.com/downloads/community_edition and then extracting it to your konakart folder without overwriting any files. That should give you all the missing files.
Regards, Artsu