Date calendar keyword

hai… i installed the calendar keywords plugin which is available as free in plugin store but those keyword is not listed in “add” drop down even i reload the plugins. can u help me for the solution.

Even i tried with custom keyword to set date and katalon shows the error as " com.kms.katalon.core.exception.StepFailedException: This calendar is not supported! (Root cause: com.kms.katalon.core.exception.StepFailedException: This calendar is not supported!"