Defender 404 Locking all IPs

On a client website, defender started locking all IP's, because a file was missing. The messages were all the same kind: "Request for file ?add-to-cart=10134 which doesn't exist." But product ID changed. I think it's because of a cronjob I've installed every 24 hours. This cronjob changes the products in the woocommerce shop. Can this be solved?

Request for file rf-alarmzender-multi-channel-akoestisch-lisa-rf-2 which doesn't exist	29 september 2017 10:00 207.46.13.58	Ban | Whitelist
Request for file ?add-to-cart=9707 which doesn't exist	29 september 2017 09:41 207.46.13.71	Ban | Whitelist
Request for file ?add-to-cart=10134 which doesn't exist	29 september 2017 09:39 207.46.13.58	Ban | Whitelist
Request for file ?add-to-cart=3217 which doesn't exist	28 september 2017 17:07 217.182.132.240	Ban | Whitelist
Request for file time-flash-flitswekker-zilver-2 which doesn't exist	28 september 2017 17:07	51.255.65.11	Ban | Whitelist
Request for file ?add-to-cart=7157 which doesn't exist	28 september 2017 17:06 207.46.13.107	Ban | Whitelist
Request for file ?add-to-cart=7342 which doesn't exist	28 september 2017 17:06 207.46.13.23	Ban | Whitelist
Request for file ?add-to-cart=11255 which doesn't exist	28 september 2017 17:06 207.46.13.23	Ban | Whitelist
Request for file ?add-to-cart=11489 which doesn't exist	28 september 2017 17:06 207.46.13.23	Ban | Whitelist
Request for file ?add-to-cart=11339 which doesn't exist
28 september 2017 17:06	40.77.167.37	Ban | Whitelist
Request for file ?add-to-cart=3166 which doesn't exist

These are the logs, and when I turn the defender on, this is what immediately happens, and after a while, you get banned.