I am not part of support just some dude…
This seems to be a theme issue… and best to contact them for help.
With that said…
I look at the demo for your theme… and your website.
And that “column” that you are trying to remove that has the widgets…
seems to only show up on Posts… not pages.
The following information would apply globally for posts.. and custom post type
that Events Manager is for single events.
You could remove that “widget” column with CSS.
So in your child theme or, with an CSS Editor.. you can apply some CSS.
As always make backups of your files before editing.
#secondary {
display:none !important;
}
#primary {
width: 100%!important;
}
Alternatively… if you wanted to remove that widget area ONLY for Single Events…
you could use method below link for editing EM templates, and edit the file
event-single.php using the method described in this tutorial….
https://wp-events-plugin.com/documentation/using-template-files/
I tested the method by simply putting at the bottom of the file,
event-single.php,
the above code wrapped in
<style>
your css here...
</style>
These solutions may not be the best but work.