1. Create user group with default Community Site template as its Public Pages.
2. Create user and assign this user to the user group.
3. Export Community Site template from other environment(so that exported layoutsetprototype didn't exist in the current environment).
4. Import the template to the current environment.
5. Login as the user created in the step 2.
6. check the user's pages.
Result: Cannot see pages and get exception below in the backend.
ERROR [http-bio-8080-exec-26][SitesImpl:607] Unable to fetch the the layout set prototype's layout
com.liferay.portal.NoSuchLayoutSetPrototypeException: No LayoutSetPrototype exists with the key