Scroll down to the bottom of this page (beyond the thread page - into Hotcopper info & options.)
I remember wombat777, & lest we forget him - saying he could no longer access Old HC which was an inconvenience for him with how he configured information posts. In a race chat one day . Others also explained how they could not access it if they never had used it or for some other reasons I can’t recall.
If it is available to you ~ simply click on it right at the bottom , below
Certainly has worked a few times for me when H c has developed glitches!
(20min delay)