I have two instances of Moodle. One is on 2.5.1 and other is on 2.5.2. Both have the same behavior when setup with Box.net service.
After the authentication, i just have the spinning circle, and the Moodle timed out with the error 'invalid JSON string'. I have checked everything and they all seem correct.
I also try to use URL downloader - same behavior.
Windows 2008 R2 - IIS 7
MS SQL 2008
Any helps is appreciated. Thanks