Hello,
Do you mean, you are trying to install the Business Consultr Pro Theme, right? If yes, please upload the theme zip file from FTP or cPanel. Then activate it from your WordPress Dashboard > Appearance > Themes. Please refer theme detail page to check the theme documentation link or refer below for more detail;
https://keonthemes.com/doc/business-consultr-pro
If you have any further questions, you can simply email us at [email protected] or post here.
Thanks.