Hello,
Thank you very much for choosing our theme and for contacting us.
Please make sure you have created all the attributes and attributes items in Latin letters. They should be only in Latin.
If you have created properly, and still have the problem, deactivate all the plugins not related to the theme and switch the parent theme, check the issue, if the problem remains, leave the plugins not activated and provide the site admin access to the private area we shall check.
Best Regards