Error occoured in deployment step 'activate feature'.Attempted to perform an unauthorized operation

This error you may find while deploying your SharePoint solution. To fix this issue you just need to make sure you have administrator permission to the site collection.

here are steps:

1)go to central admin
2)Change Site collection adinistrator
3)Add system logged in user name as primary or secondary site administrator
4)Deploy solution

We will find you solution get deployed.