Soketi.app wss Problem

Hi, I try to deploy my laravel app to vps plesk server i use soketi for realtime data flow but https requires wss I could not set cert file to soketi start code could you help me pls? soketi conf file is { "debug": "false", "port": "6001", "SSL_CERT": "/opt/psa/var/modules/letsencrypt/etc/live/_plesk_domain/cert.pem", }