We have been using the Thunderbird Filelink option with Box very satisfactorily until a month or so ago when it stopped working. At that point the Box account was shown as needing authorisation and nothing happened when I clicked the Authorise button. I understand that Box updated it's APIs and broke the linkage but that this had been fixed in the latest vesions of Thunderbird. So I then upgraded Thunderbird to v31.2. Now clicking the 'Authorise' button brought up a Box login and I am able to login using our account details. I then click the 'Grant access to Box' button and it reports 'Error invalid client' with the following details: scope=root_readwrite folder_id= response_type=code redirect_uri=http://localhost state= client_id=exs8m0agj1fa5728lxvn288ymz01dnzn

I have now installed the latest Thunderbird Beta v34.0b1 I could find and the same thing happens. Assistance in resolving this problem would be greatly appreciated.