I had the same issue and resolved it by:
Created and Enterprise Search site
In CA > Manage service applications (under Service Apps) > User Profile Service App > Setup My Sites > Preferred Search Center and entered:
http://[yourdomain:port]/[path to enterprise search site]/Pages/
When I search from My Sites I now go to
The way I found it was to look at the difference between the URL the Ent. Search used and what I had entered in "Preferred Search Center" field in the My Sites service app config.
Crawling is something different.