I'm assuming you're using IPB 3.4.x based on your profile and your first error.. this theme is for 3.3.x.. fairly self-explanatory as to why you're experiencing these issues. You may be able to rectify the first issue by following this oh-so-easy-to-search-for tutorial...
The second issue is likely related to using a Portal that was updated for 3.4.x, further compounding the fact that you're using a theme a full version below 3.4.x.
I recommend switching themes, holding out for an updated copy, or possibly considering joining the funding pool to purchase the theme, as outlined in my thread, here: