Hello Andrea,
Unfortunately the parts of the vmware.log file that you copied and pasted into your reply do not contain the specific details about why not.
However you mention that you had to disable 3D on the guest in order to not have the guest crash, I'm suspecting you are bumping into another issue.
Please have a look at this:
Fusion 8.0 conflicts with Nvidia web driver for Mac
If that is not your problem then attach the full vmware.log file to your reply here (not just a snippet)
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Wil