This is caused by the version of apache not being what ISPConfig expects it to be. The ISPConfig virtual hosts file, located /etc/httpd/conf/vhosts/Vhosts_ispconfig.conf, has some configuration file lines that need to be removed. The lines are not a bug but are for different versions of apache.
It has been awhile since I have used ClientExec and the Authorize.net plugin. ClientExec has really come a long way and everything went really smooth until I tried to start testing processing credit card orders. I filled in a new customer and attempted to save a credit card for the new user and the screen would go completely white on submit and not do anything. I wasn’t able to get much from the Apache logs or MySQL logs but finally remembered a couple packages that have to be installed for the Authorize.Net plugin to work.
All of the following can be installed with yum:
yum install libmcrypt php-mcrypt curl
I noticed this error during an ISPConfig on CentOS 5.2 install and realized I had installed postfix without MySQL support. After looking around for a bit I was unable to locate a yum repository that included a postfix package with MySQL support built in so I decided to download the source RPM and install by…