“no options” on add page

I try to add a page to an app in the reactpress menu. I already created the folder inside reactpress/apps.

When I click “Add page”, a menu unfolds that only says “No options”.

When loading the reactpress page, I get a 500 error.

Could anyone point to how I could solve this problem?

GET https://awctourspel.development.2special.nl/wp-json/wp/v2/pages?status%5B%5D=any 500

The exact response to the request:

{"code":"rest_invalid_param","message":"Ongeldige parameter(s): status","data":{"status":400,"params":{"status":"Status is verboden."},"details":{"status":{"code":"rest_forbidden_status","message":"Status is verboden.","data":{"status":401}}}}}

Thanks for any help.