Wordpress And Bookly Plugin

I am trying to create a website which includes an appointment Wordpress plug in. I uploaded a custom theme I have created with Blocs, but the plug in is not loading properly. Specifically, it has a spin gif like it is trying to load the plug in, but this never happens. When I change the theme (ex. twenty seventeen) the plug in works perfectly.
Any ideas?

Plugin Bookly 21.2
WordPress 6.1
PHP 8.1.12

Can you look into the error log file of your server and paste the output here? That should indicate what is going on.