Looks like there was a commit shortly after DBD::Oracle-1.90 was released to fix that problem.

You can wait for a new release including the fix or try going for an older version of the package (since the commit message implies the error had only recently been introduced). You could also consider applying just that change to your package to see if it gets you further, or contacting the dbi-users mailing list referenced in the README to see if they have any other suggestions.