You may see errors like the following in the Apache log after a failed restart.
[Sun Aug 23 10:44:25.973858 2020] [ssl:emerg] [pid 1200380] AH01898: Unable to configure permitted SSL ciphers
[Sun Aug 23 10:44:25.973887 2020] [ssl:emerg] [pid 1200380] SSL Library Error: error:1410D0B9:SSL routines:SSL_CTX_set_cipher_list:no cipher match
[Sun Aug 23 10:44:25.973893 2020] [ssl:emerg] [pid 1200380] AH02312: Fatal error initialising mod_ssl, exiting.
This can occur if the SSL Cipher Suite configured for Apache is not available in the installed OpenSSL version on the server.
The SSL Cipher Suite will need to be adjusted to match the OpenSSL version on the server. We recommend selecting the default SSL Cipher Suite. The SSL Cipher Suite can be changed in the following location of WHM.
Home » Service Configuration » Apache Configuration » Global Configuration