I had the same error. It took some time for me to find the solution.
In my case, I found out, that the apache rpm was not installed. I tried to install it manually and got a failure message, that the MD5 sum is incorrect. Then I checked the MD5 sum of the downloaded ISO and found out, that there was also a problem. I´m going to download the iso again from linuxiso.org, because they have a checksum on their files. When I´ve installed the new version again, I hope that the problem is gone. If you are interested tell me.
Chrisi