Index wp_searchable_posts does not exist

Hello
i installed the plugin, got all API keys etc, indexed the website, did all the settings but when i try to do a search, in the console i get a bunch of XHR requests to
https://0ru1pujm9j-dsn.algolia.net/1/indexes/wp_searchable_posts/query?x-algolia-agent=Algolia%20for%20vanilla%20JavaScript%203.20.2&x-algolia-application-id=xxxxxxxxxxx&x-algolia-api-key=xxxxxxxxxxxxxxxxxxxxxxxxxxx
that returns the JSON {“message”:”Index wp_searchable_posts does not exist”,”status”:404}.

i have removed the object-cache.php already but no help there, any ideas?