Good evening Myla and welcome back!
Thank you for reaching out to us.
We are sorry to hear about the fact that you are unable to add the widget after the update.
I would love to help you with this topic.
As a first troubleshooting step, could you please provide us with your complete system information in a private reply using the instructions found in the following link?
https://theeventscalendar.com/knowledgebase/sharing-sys-info/
Secondly, you might want to try going to Events -> Settings -> Display and set Events template to default page template OR if that’s already the setting, simply re-save that page.
Have a good week-end,
Geoff B.