I have a problem theme demo importer.

Hello Sir/Madam
I am Imran. I parched the theme from Envato Market. I have some problems importing theme demo content. I shared a screenshot of the theme issue.
Please check and resolve my problem.

This Is the original Theme Link this theme I purchased (http://preview.themeforest.net/item/abape-tour-booking-travel-wordpress-theme/full_screen_preview/20794183?_ga=2.949624.879266698.1690353514-421315176.1690353514&_gac=1.82239204.1690353514.Cj0KCQjw5f2lBhCkARIsAHeTvlhiO8sKcEXaSf4AFarHsLWubXKpZqc2G9Eaji1vmAnx5XvTHmwjxpQaAqwvEALw_wcB) and
My website URL is (https://triptoin.com/beta/)
When we upload a theme and import demo data then it is not showing content properly and the header is not fixed in the proper manner. plz check and fix my problem.