A Cloudflare spokesperson told Ars that the cloud services provider saw “a spike in unusual traffic to one of Cloudflare’s services,” which “caused some traffic passing through Cloudflare’s network to experience errors.”
“We do not yet know the cause of the spike in unusual traffic,” the spokesperson said. “We are all hands on deck to make sure all traffic is served without errors. After that, we will turn our attention to investigating the cause of the unusual spike in traffic.”
next time you’re at bat against one of these, you may try moving less diligently / efficiently to the checkbox. overall, a slowed and less exact approach. I’ve not tested this enough to REALLY say it makes a difference, but in cases where I continually fail, going slower does seem to be the time I finally get through.
I find the same for the picture puzzles where you select images that match or apply to the posted context or whatever else the mission may be.