From my understanding libraries API
https://www.drupal.org/project/bootstrap_api or https://www.drupal.org/project/bootstrap_library (which I guess do the same things...) are not required for the drupal bootstrap theme (not really sure why they are even necessary) The style.less includes @import '../../libraries/bootstrap/less/variables.less'; and is causing an error. should that use the bootstrap base theme version?
From my understanding libraries API https://www.drupal.org/project/bootstrap_api or https://www.drupal.org/project/bootstrap_library (which I guess do the same things...) are not required for the drupal bootstrap theme (not really sure why they are even necessary) The style.less includes @import '../../libraries/bootstrap/less/variables.less'; and is causing an error. should that use the bootstrap base theme version?