The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
Maybe it is related to mods — The log contains no crash related error, “just” some warnings related to the mods. OP needs to test it further with a mod-free environment, then debug it one by one to narrow down the issue. Even when he would crash, without any active mod, then it would already be some progress.
