Summary:
The calendar within the Time tab of Web TimeSheet Integration in Web Resource 2.12 may appear to be grayed out.

Cause:
This happens if RepliConnect API is not enabled within Web TimeSheet.

Resolution:
Log into Web Resource.
Click on Administration.
Go to Web TimeSheet Integration.
Within the Web TimeSheet Integration page, click on the Time tab.
Enable RepliConnect API.
The calendar showing the time duration within the 'Time Settings' block appears grayed out.