As a many of you have noticed, this weekend we seem to be under attack from a sustained influx of spammers. In order to try and reduce this, I have raised the 'security level' on one of moodle.org's spam protection systems (cloudflare).
Unfortunately, we've found that in the past that this can sometimes cause 'false positives' intercepting non-spammers.
Please accept my apologies if this happens to you, and if you can report any problems on MDLSITE-2140. We'll hope to resolve it.