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

Symptoms

• It is not possible to access Plesk. 
• While trying to start sw-cp-server the following error occurs: 
  

  # 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]

• The /usr/local/psa/admin/conf/httpsd.pem file is missing:
  

  # ls -la /usr/local/psa/admin/conf/httpsd.pem
  ls: cannot access /usr/local/psa/admin/conf/httpsd.pem: No such file or directory

Cause

Missing  httpsd.pem certificate file.

Resolution

1. Login to the server via SSH.

2. Recreate httpsd.pem certificate using following steps:

   # cd /usr/local/psa/admin/conf/

   # openssl req -new -nodes -x509 -out httpsd.pem -newkey rsa:2048 -keyout httpsd.pem -days 3650

3. Restart sw-cp-server:

   # service sw-cp-server restart