Thanks whpalmer4!
Made the call, and spoke to support. The fix was to delete the cache file com.omnigroup.OmniFocus under home/library/caches. I lost all the changes I had made so far since the error occurred, but did lose the core data and I'm now able to continue
Made the call, and spoke to support. The fix was to delete the cache file com.omnigroup.OmniFocus under home/library/caches. I lost all the changes I had made so far since the error occurred, but did lose the core data and I'm now able to continue