After installing or upgrading Payment gateways mod I'm getting one of the following errors:
Can't locate Digest/HMAC_MD5.pm in @INC
Can't locate XML/SAX/PurePerl.pm in @INC
Can't locate XML/Simple.pm in @INC
1. Go in cgi-bin/Plugins/Payments/ directory and delete all payment plugins that you're not planning to use
2. If you're still getting that error, install all Perl dependencies specified in INSTALL.txt which is bundled with the Payment Gateways Mod distribution.