400 Bad Request

So, I’m getting this when accessing the CRON URL.

It’s been discussed before – https://wordpress.org/support/topic/why-pipes-are-not-updating/ and https://wordpress.org/support/topic/cron-does-not-update-pipes/

But I found no solution. My CRON URL is https://www.fabiodonadon.adv.br/?pipes=cron&task=callaio . Sever is a VPS running Apache/Nginx/PHP7 so if there is any configuration I can do, just shoot.

Weird thing is, WP-Pipes updates correctly whenever I click TEST. I know this might not be an issue with the plugin per se, but I can’t figure out what’s going on, and it was working correctly until around 10 days ago. Nothing has changed as far as I remember.