As per the announcement, posted on the Tool's homepage:
[Apollo-ITN] Method is currently unavailable
In the meantime, Gold/Platinum-tier users should switch to [WSpan: ITN], [Sabre: ITN], or [Galileo] to ensure uninterrupted access. Further information for Lite-tier users will be posted as it becomes available.
Do you know if this is likely to be temporary or permenant?
Thanks,