Note: This is not caused by ASL.
This means someone manually removed the libapr-1.so.0 library from your system. You will need to investigate how this occurred, as ASL will not allow itself to be installed on a system that does not report this is installed. If you get this error after installing ASL this means your OS believes this library is installed but someone manually removed it without telling your OS.
You may be able to reinstall this library with these two methods:
yum reinstall apr
yum install apr