Fixed – Field Service Time Entry functionality is not available. The installed version of Project Service Automation is not compatible with the installed version of Field Service. Please upgrade Project Service Automation to use Field Service Time Entry functionality.

Recently while trying to set Bookable Resource Booking record’s status as completed or trying to change Settings >> General >> Field Service Settings >> Time Entry, we were getting below error

We can see the Dynamics 365 Project Service Installation Failed and on retrying the installation it was giving below error.

The fix that worked here was to install the Project Operations.

Hope it helps..