Write what happened and we will reply to the address you leave here.
Three things worth checking first, because they catch most people:
"Confirm your email first" even though you already did — you are probably using the
preview key from the signup screen. Open API & MCP in the dashboard and use the key shown there.
A post fails on TikTok, Instagram or YouTube — those networks require media. TikTok and
YouTube need a video, Instagram needs a photo or a video.
"that file is NNMB and the limit is…" — TikTok videos are streamed through us and can
be up to 1GB. Other networks are capped at 80MB, and a host that does not report a file size
is capped at 80MB too, because then the video has to be held in memory.