Undefined index: corporateclean in theme_get_setting() ??

Hi,

I installed the corporate clean theme as a subtheme under sites\all\themes\mytheme. Now every time I reload the page I get the following errors:

- Notice: Undefined index: corporateclean in theme_get_setting() (line 1439 of C:\Bitnami\drupal-7.43-1\apps\drupal\htdocs\includes\theme.inc).

- Notice: Trying to get property of non-object in theme_get_setting() (line 1476 of C:\Bitnami\drupal-7.43-1\apps\drupal\htdocs\includes\theme.inc).

- Notice: Trying to get property of non-object in theme_get_setting() (line 1486 of C:\Bitnami\drupal-7.43-1\apps\drupal\htdocs\includes\theme.inc).

I went through all the files, template, page.tpl, etc and change all "corporateclean" to "mytheme" and still I get theses errors. Does anyone know what might be the problem ?

Thanks