Could not post comment
The comment form’s POST failed and the client could not map a specific message (empty, too long, captcha, disabled, and so on).
Why this happens
Malformed response, network error, or an unmapped server status. When the API returns known codes, you should see those instead. Distinct from Could not save comment (server DB save failure after validation).
Diagnose and fix
1. DevTools → Network on the comments POST — read JSON error / code.
2. Confirm signed-in (where required), comments enabled, captcha completed.
3. Check empty/length/filter rules (Comment cannot be empty, length articles).
4. Retry after fixing the underlying gate.