Try downloading and using the following before importing.
ThemeREX Activator
https://mega.nz/file/JDZGALoD#4vFZ4rJgUbiVUGoudogjzmqCqKc1JsobPpahGa9KAwA
https://www.virustotal.com/gui/file...813a12d233b3eadaf651208418d878ddd60?nocache=1
ThemeRex Addons
https://mega.nz/file/9TAHEZQR#iR9mG8BcB13snOT-wL9GGkq5W3kWH224K2k2Vco2pcQ
https://www.virustotal.com/gui/file/1b91385fd6c1858fde957990b64707d00c101ced423786ff4cd241a1d1693e70
Thank you but how to use these Activator ? uploaded and try to open on website but doesn't work- nothing happend.