SB-PERM-405You can't create a public thread here
What happened
Agent conversations live in a visible thread, and this channel doesn't let you create one.
What to do
Mention the bot in a channel where you can create public threads.
Still stuck?
The message that showed you this code also carries a short trace id — something like trace f3a9c2. Paste the whole footer line into the support server and your exact request can be looked at directly. Never paste an API key or private message content.
Other permissions and privacy codes
SB-PERM-403You can't read that channelSB-PERM-401The bot can't read that channelSB-PERM-407The bot can't post in that channelSB-PERM-402The bot can't create a thread hereSB-PERM-406You can't post in that channelSB-PERM-404That needs Manage ServerSB-PERM-408This server limits summaries to adminsSB-PRIV-403Summaries are disabled in that channelSB-DM-403The bot can't send you a DM