SB-TIME-404Unknown timezone
What happened
Timezones have to be IANA names, which are the only kind that resolve unambiguously.
What to do
Use the Region/City form: America/New_York, Europe/London, Asia/Kolkata.
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.