Uploads have been fine for years. Now they only work if we switch off the custom domain.

I have posted a ticket and details of the issue on a few Zoho sites and got zero response.

https://help.zoho.com/portal/en/ticket/4011681957006

Please respond. We have a conference this weekend and if everyone at our talk uses Teams we are gone. We have invested a lot of time into Connect and while it is aging and development seems to have stopped it it does what we need - when it worked.