I am not familiar with phpicalendar, is a completely different package from webcalendar.
If the analysis is correct and the error comes from apache2 failing to reload due to a missing a portion of the phpicalendar package, not a problem with webcalendar.
I am not familiar with phpicalendar, is a completely different package from webcalendar.
If the analysis is correct and the error comes from apache2 failing to reload due to a missing a portion of the phpicalendar package, not a problem with webcalendar.