Calendar events management plugin/integration

Your software
My Mautic version is: 3.3
My PHP version is:
My Database type and version is:

Your problem
My problem is: Getting calendar to work

These errors are showing in the log:

Steps I have tried to fix the problem: Searching for a plugin or integration that does the job

Hi there,
I’m looking for a plugin or integration that adds the following features to calendar see link: Add Events from Calendar View in Mautic | Digital School Marketing

Anyone can point me to the right direction?