You can display widget on the inner pages with the help of this plugin ”amr shortcode any widget” (https://wordpress.org/plugins/amr-shortcode-any-widget)
Please have a look at
https://wordpress.org/plugins/amr-shortcode-any-widget/installation/
After adding the widget to the shortcodes sidebar, go to the edit screen of the page:
[do_widget “Vertoh Tickets List”]
While we do not endorse the use of external plugins, this extension could help you to add the widget on the inner pages.