Hi Victor,
Thank you for your response! I increased the PHP memory limit but then I was receiving this message in the error logs:
PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home1/mcmaste3/public_html/wp-content/plugins/the-events-calendar/src/Tribe/Template/Month.php on line 720
So then I increased the timeout to 60 seconds and it’s working!
Thank you for the links about caching/performance optimization. I have taken a look and believe we already had the caching setting selected.
The development-focused articles was helpful and I already have the Query monitor installed. We will definitely need to consider site performance in some creative ways moving forward.
Thank you for your help!
Heather