Using Softalicious to upgrade https://cidoc-dswg.org/wiki/ from 19.1 to 21 I get this error:
'' The following errors were found :
Required PHP extension not found : calendar''
There are 9 PHP files with calendar or calendars in their file name in the current installation.
Any suggestions as to what is missing and how to fix it so I can complete the upgrade?
Not a lot help from I’m sorry.
I never seen such error... I believe it is specific to your configuration or the softaculous install. Do you use fullcalendar ? Is the package installed (control-panels => packages) ?