URGENT: Cannot Renew APNs (MDMP Free Edition)

URGENT: Cannot Renew APNs (MDMP Free Edition)

Hi !

I have only 7 days left to renew iOS APNs certificate.
When I click the Renew link, an error occures on the Chrome Console.

apnsCertificate.js?92433:1 Uncaught ReferenceError: mdmUrl is not defined
    at apnsCertificate.js?92433:1
(anonymous) @ apnsCertificate.js?92433:1
ajaxRequest.js:1 Uncaught TypeError: undefined is not a function
    at eval (eval at constructResponse (VM438 ajaxRequest.js:1), <anonymous>:3:1)
    at constructResponse (VM438 ajaxRequest.js:1)
    at XMLHttpRequest.window.XMLHttpRequest.req.onreadystatechange (VM438 ajaxRequest.js:1)

I'm using Mobile Device Manager Plus Free Edition

Please Help :(