Too many uploads
Too many Member API upload control requests in the current hour (init / complete / cancel / single-shot). Message: “Too many uploads. Try again later.” (429).
Why this happens
This is an hourly API rate, not parallel slots. It applies to /api/v1/upload* buckets (api_upload_rate_per_hour, often ~30/hour by default). Browser desktop upload uses different strings (upload starts / completions / parts rates).
Diagnose and fix
1. Wait for the window to reset; space out API uploads.
2. Admin → Settings → Mods — raise api_upload_rate_per_hour if automation needs more.
3. Check per-user API rate overrides if you use them.
4. For browser traffic, see Upload starts rate, Upload completions rate, and Too many upload completions instead.