Certificate not been generated while installing Blynk Server

I am running the latest version of Blynk Server 0.41.16, the server while being made to run for new setup doesn’t load the certiifcate as required like earlier which loaded the letsencrypt I am facing the server certificate generation issue from 0.41.15 version .It only shows
Blynk Server successfully started.
All server output is stored in folder ‘respective folder’ and not like earlier which displayed message generating certificate… kindly guide on this

@Dmitriy - one for you?