Plesk is not accessible: Starting sw-cp-serverd: nginx: [emerg] BIO_new_file("/usr/local/psa/admin/conf/httpsd.pem") failed

Symptoms

Unable to access Plesk.

sw-cp-server can not be started due to the error:

# service sw-cp-server start
Starting sw-cp-serverd: nginx: [emerg] BIO_new_file("/usr/local/psa/admin/conf/httpsd.pem") failed (SSL: error:02001002:system library:fopen:No such file or directory:fopen('/usr/local/psa/admin/conf/httpsd.pem','r') error:2006D080:BIO routines:BIO_new_file:no such file)
                                                           [FAILED]

/var/log/plesk/sw-cp-server/error_log contains the same errors.

Cause

Missed httpsd.pem certificate.

Resolution

1. Recreate httpsd.pem certificate:

   # cd /usr/local/psa/admin/conf/ 
   # openssl req -new -nodes -x509 -out httpsd.pem -newkey rsa:2048 -keyout httpsd.pem -days 3650
   

2. Restart sw-cp-server :

   # service sw-cp-server restart