I'm not very familiar with it as well.Unfortunately this is a script error of some form as opposed to a server/service misconfiguration; I would recommend contacting the software developers to see if they know how to get past that error, especially as there's other users running MyBB without that same error appearing.
Sorry for the double post, but I'm basically getting the same error with SMF. It's saying that it cannot unzip the en Language files when I try to use it in the software installer. Should I just upload it manually or??Unfortunately this is a script error of some form as opposed to a server/service misconfiguration; I would recommend contacting the software developers to see if they know how to get past that error, especially as there's other users running MyBB without that same error appearing.