One of the updates to Perl changed a default. Perl used to default to searching the current directory for modules, but no longer does so. If you are getting errors suggesting modules are missing, you might try adding use lib '.'; to the code that has the problem. But you will get better answers if you show that code and the errors, and may find it yourself if you try to prepare a SSCCE (http://sscce.org).

Regards,

John Davies