What export settings are you using to upload large gigapixel images? (beyond the 65.000 pixel JPG limit)
I have tried PSB with PackBits compression once layered, once flattened. Then TIFF with LZW compression and 'No alpha channel'.
But every time it fails with a different error, at 98% the first two times (failed to complete, even though it finished every step), and then halfway when verifying the tiff.
After each fail the Uploader refused to sign in to my account for a while. Then the actual site fails to load in the browser..
Something very wrong over there.
Any alternatives? Seems they're on their last legs, or maybe it's just me.
There's 360cities, but i believe they only accept full 360 spherical - like most of them.