If that is what the phpinfo() function is telling you, then it's "right".
That is certianly understandable; not everyone is a programmer.
Is the software you are running a commercial product, is it open source, is it readily available for others to inspect the code?
If you purchased the software, you should try contacting the author/seller, report the error message you are receiving. and ask for help in getting it sorted out.
If it is readily available source code (opensource, etc.), the community of users that use that product is often a good place to seek help - they use it and certianly some of them understand how it works. Some have likely already run into a similar problem as you, and the fix is likely to be fairly simple.
The problem you have here is that we don't know what software you are running, can't see the code, and can only point you to a definition of the function that returns the error for help.
IF the product is freely (free as in "free beer" as well as free as in "freedom"), posting a link to where the software can be obtained might induce someone here with the interest, expertise, and time to look at it for you.