Not sure exactly what error we're getting but just tried to submit a Child Protection takedown and got the following error. (truncated so we'll have to look in the logs for the full error):
401 Client error: POST https://report.cybertip.org/ispws/submit resulted in a 401 Unauthorized response: <?xml version="1.0" encoding="UTF-8" standalone="yes"?><reportResponse><responseCode>2000</responseCode><responseDescrip (truncated...)
Attempt was sent ~10 minutes ago (~4:05PM June 20 Pacific). For now I'll submit using the backup form on NCMECs site.