Sign in error: Error Domain=HPHackpadErrorDomain Code=0 "The server sent an invalid response."

2016-03-15 12:13:52:105 Hackpad[814:3079] Sign in error: Error Domain=HPHackpadErrorDomain Code=0 "The server sent an invalid response." UserInfo={HPURLErrorFailingHTTPStatusCode=404, NSErrorFailingURLStringKey=https://hackpad.com/ep/account/api-key, NSErrorFailingURLKey=https://hackpad.com/ep/account/api-key, NSUnderlyingError=0x15cfb1160 {Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set." UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}}, NSLocalizedDescription=The server sent an invalid response., HPURLErrorFailingHTTPMethod=POST}
2016-03-15 12:14:09:578 Hackpad[814:3079] Sign in error: Error Domain=HPHackpadErrorDomain Code=0 "The server sent an invalid response." UserInfo={HPURLErrorFailingHTTPStatusCode=404, NSErrorFailingURLStringKey=https://hackpad.com/ep/account/api-key, NSErrorFailingURLKey=https://hackpad.com/ep/account/api-key, NSUnderlyingError=0x15e48b4b0 {Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set." UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}}, NSLocalizedDescription=The server sent an invalid response., HPURLErrorFailingHTTPMethod=POST}