I have recently migrated my sites from SharePoint 2010 to SharePoint 2013. I have done this by attaching the 2010 content database in to SQL, creating a new web application and then mounting the content database. Once the content database was mounted I was then able to upgrade each site collection.
The migration appears to have run successfully as users content is available such as documents etc... however I am finding that if I search for a user and navigate to the users mysite then select "Apps" from the quick links I see the following page:
If anyone could please provide some help or guidance on why this might be happening then it would be greatly appreciated.