Ended up checking out the WP Support forum and stumbled upon this thread in which several other users were having the same issue. The advise given didn’t work but I resolved the issue on my own and posted it in the forum as well.
Never had this issue before with this theme and plugin but just grateful it is solved. Here is the resolution below in case you have other help requests. Many thanks : )
https://wordpress.org/support/topic/calender-not-displaying-monthly-view?replies=6
Hello all,
I was having the same exact issue, same site latest version of Canvas 5.9.15. This is how I fixed it.
Go to Event Settings > Display and select default events template from the drop down. Next make sure to check all the events views under “Enable event views” and select your Default event view.
Not sure why these settings weren’t set (by default?) but I’ve used this plugin with this theme many times and never had any issues until now.
Anyway, changed those settings and everything is working just fine!