1. PHP REQUIREMENT LINK : https://www.k5n.us/webcalendar/#System_Requirements
2. Click "Create a database" despite of having a database already in manual.
3. Create an empty cache directory in data directory path and fill the path in "Advance Options" in manual. Admin panel is not getting accessed without it https://htmlpreview.github.io/?https://github.com/craigk5n/webcalendar/blob/master/docs/WebCalendar-SysAdmin.html (Docs has recommended to keep cache out of web accessible path)
4. Default username/password is admin/admin. https://htmlpreview.github.io/?https://github.com/craigk5n/webcalendar/blob/master/docs/WebCalendar-SysAdmin.html
5. Add webcal_user_pref insert in sql for language
6. Disabled the script on ampps because the script throws an error on adding anything(event,categories etc in manual as well)