mytechlead

awesome, thanks @wpswings

im running this in a docker container, I fixed it by building an image using this file:

https://github.com/docker-library/wordpress/blob/5bbbfa8909232af10ea3fea8b80302a6041a2d04/latest/php8.0/apache/Dockerfile

and adding “calendar” to the list of php extensions to install

this happens just by activating the plugin, tried it with all other plugins deactivated