WP CSS not used

On my instance, the CSS of my wordpress theme is not used to display the WP-LDP page. See here: http://maiadereva.semeoz.info/wp-ldp/front#http://maiadereva.semeoz.info/ldp/person/maia-dereva/

Which default template file does the plugin use to display that page? Maybe it's missing in my theme and I should create it?

Start by reproducing the WP-LDP page display at the linked instance and inspect how the WordPress theme is selected for that page. Identify the default template file used by the plugin and verify whether the reported theme can render the page with its CSS; done means the template choice is documented or the missing integration is isolated.

Written by the indexing model from the issue text.