Resolved Cloudflare HTTP520 after ~37000 products

Hey Tharuna and Roland,

We moved behind Cloudlfare this week to mitigate some issues, however we get an error when uploading products.

Our error.log ends with

[Wed Dec 18 18:19:12.262094 2024] [lsapi:warn] [pid 1043310:tid 139979699021568] [client x.x.x.x] [host youknow.nl] Backend log: PHP Warning: Undefined property: stdClass::$operation in /home/x/domains/x.nl/public_html/plugins/csvirules/fieldcombine/fieldcombine.php on line 241\n, referer: https://x.x/administrator/index.php?option=com_csvi&view=import

I cannot find anything within cloudflare Firewall logs, so its not hitting any of our rules based on the ray id, however i do see the HTTP520 in Cloudflare:

520 Origin Error

So that seems to be *something* on our end. Have you seen this before? What more info would you like?