Upgrade from 7.4 to 7.5

Hi

I used the upgrade wizzaed to successfully upgrade to 7.5, however there appears to be an issue with Activity Streams, its missing from the home page and when you go to admin and select activity stream a server error along with a page a404 error occurs. Retored orginal files and database and tried again but same issue, so back to 7.4 until someone advises

Sam here. My Activity Stream missing from home page. Users very unhappy!.

What version of PHP?

From here: https://suitecrm.com/forum/suitecrm-7-0-discussion/8054-upgraded-to-7-5-1-breaks-activity-stream#28289