That is the default CWP configuration, so it's good to know you haven't manually changed anything to deviate. How about if you manually create the cache file:
touch / usr / local / apache / logs / ssl_scache
Then you may want to rotate or truncate the access_log and (especially) error_log so as to reduce the file size and noise, to keep it current:
truncate -s0 / usr / local / apache/ logs / access_log
truncate -s0 / usr / local/ apache / logs/ error_log
Restart Apache and watch for your error again. (I was seeing about ~5 instances a day recently.) But do notice that it's just a warning, so not overly concerning.
Note: Of course, delete the spaces in the paths above -- the forum doesn't like some system paths being referenced in posts