[Koha] OAI Error: Extra content at the end of the document

I am quite new to Koha and I am trying to set up OAI. I already enabled preference OAI-PMH, but when I try to access http://YOURKOHACATALOG/cgi-bin/koha/oai.pl I get the following error: This page contains the following errors: error on line 2 at column 1: Extra content at the end of the document Below is a rendering of the page up to the first error. What am I doing wrong? -- Sent from: http://koha.1045719.n5.nabble.com/Koha-general-f3047918.html