We started using the CiviVolunteer extension with success. However, after we upgraded to the security release 4.7.21 some of the CiviVolunteer functions do not work. Or they cannot be accessed from the navigation menu.
We cannot access the following functions; - New Volunteer Project - Manage Volunteer Projects - Search for Volunteer Opportunities
In addition, the CiviVolunteer menu items cannot be seen on the Navigation Menu editor (Administration > Custom Data and Screens > Navigation Menu)