cant access customize in the WP panel

when I access the customized section under Appearance in WP I get no options, the screen is blank. The only error I get is:
" Your theme (R-Energy) contains outdated copies of some WooCommerce template files. These files may need updating to ensure they are compatible with the current version of WooCommerce. Suggestions to fix this:

  1. Update your theme to the latest version. If no update is available contact your theme author asking about compatibility with the current WooCommerce version.
  2. If you copied over a template file to change something, then you will need to copy the new version of the template and apply your changes again.

Learn more about templates View affected templates"

If you are not able to access customize your WP panel contact your theme author