jetpack:[auth_failed] Authorisation header was malformed

Hello,

Im afraid i dont know the version of wordpress i am using – my problem is with my wordpress ap on my ipad – it was working perfectly – but now i am getting the following error – Sorry, we cant log you in. jetpack:[auth_failed] Authorisation header was malformed. I deleted the ap and reloaded it, but the error still recurs. it was working fine up to 20 minutes ago. my blog is http://cardinalenvironment.wordpress.com. please would someone help me. Thanks!!