Calendar add events plugin or custom view

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

Your problem
My problem is: Getting the calendar to work

These errors are showing in the log: Calendar is extremely useful and needed however it is a complete static widget now

Steps I have tried to fix the problem:
I’ve been researching for different options to the extent of integrations and plugins.
Haven’t found one yet that does the job. Anyone interested in developing a plugin or a custom view for the calendar pretty much in the same fashion of these: