Subject: | $EXPORT_OK should be @EXPORT_OK |
This looks wrong and prevents from importing md5: https://metacpan.org/source/BINARY/String-UTF8-MD5-0.01/lib/String/UTF8/MD5.pm#L10
$ perl5.22.0 -MString::UTF8::MD5=md5 -e1
"md5" is not exported by the String::UTF8::MD5 module
Can't continue after import errors at -e line 0.
BEGIN failed--compilation aborted.