Daniels Wrath

Hello everyone, I just created a Tekkit server so I and some friends could play on the server together. However, every time I try to start the launcher and then click on 'play' (while having tekkit selected) the launcher crashes. It's really annoying and it both happens on my mac (osX yosemity) and on my pc (windows 8.1 x64). One of the logs can be found here Thanks in advance