Quote Originally Posted by mc12345678 View Post
Good, so looked through my cart as well which is ZC v1.5.1 and found only one instance of that function as well, it was in easypopulate_4.php. A search of the global encyclopedia indicated that requires php 4.0.6 or higher to be installed/used...

Also it appears that you need to enable mbstring in your php.ini file... Possibly installing/activating php-mbstring or something similar?
The only other thing is that if the above doesn't resolve your issue, there may be something related to the text in that statement, that you may need to use something other than UTF-8. I do not recall what format the ZC database is in for version 1.3.8, but if not UTF-8 then there may be a compatibility issue with EP4 and your database. I can not say that for sure, but it could be an issue.