Hi,
Firstly, make sure if the version used for webagent is supported .
I had seen this issue before and performing below tasks had solved the issue for me. Hope this helps !
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As root user
cd /etc/ld.so.conf.d/
vi apache.conf
and add the below 3 lines in apache.conf
Apache_Home/modules
Apache_Home/lib
Siteminder_Home/webagent/bin
Once the above is done run the following command.
/sbin/ldconfig
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ldconfig creates the necessary links and cache to the most recent shared libraries found in the directories specified on the command line, in the file /etc/ld.so.conf, and in the trusted directories (/lib and /usr/lib). The cache is used by the run-time linker, ld.so or ld-linux.so.