error starting PHP 7

new install of PHP7 on ibm i. install completed, but getting error when I
browse to the Zend PHP 7 admin server:
http://172.16.1.254:10091/ZendServer/#!/
{"message":"Zend Server failed during initialization: Dependency failure:
Zend Utils extension must be loaded","prevs":["Dependency failure: Zend
Utils extension must be loaded"]}

which is identical to this post:
http://forums.zend.com/viewtopic.php?f=77&t=132448

but I do not follow when he says "...So I went into /usr/local/lib and
renamed libz.a to libz.a.old ...." Not finding that file to rename.

but in general, how to get support for zend php? I call the rogue zend
contact number and only get voice mail.

thanks,