Help to install Libresign on nexcloud without docker

Hello I am trying to install libresign but I have a problem when I am in the settings of libresign to create a root certificate, it tells me impossible to create the certificate.

Could you help me?

also I have this error when I open the API links
{“success”:false,“result”:null,“errors”:[{“code”:405,“message”:“Method is not allowed:“GET””}],“messages”:}

Help to install Libresign on nexcloud without docker · Issue #400 · LibreSign/libresign (github.com)