Normally, activation of WP Travel Pro plugin in already built site doesn’t affect the site but the issue may raise due to presence of third party plugins( if you have used any ) due to incompatibility of third party plugins with WP Travel plugin.

Also, the layout issue may raise if the theme you have used is incompatible with WP Travel plugin.

To view the list of themes which are compatible with WP Travel plugin, you can refer link.

If you have any queries, please submit it to our contact page.