ok = a file was produced (the only charged status). Everything else is free: invalid_url (not a web address), unreachable (the host does not exist or refuses the connection), http_error (the page answered 404, 500 and the like: no file is saved), blocked (401, 403, 429 or a bot challenge: no attempt to get around it), timeout (not captured within the timeout), blocked_unsafe_url (not http/https, or private/loopback/metadata address, also after redirects), empty_capture (the browser could not produce a file: selector not found, empty image, crash, a file download), blank (the page rendered as one flat colour with no text and no pictures, often a bot challenge: the file is not kept).
Options:okinvalid_urlunreachablehttp_errorblockedtimeoutblocked_unsafe_urlempty_captureblank