Diagnosing what causes "Http error 400 while talking to LAPI"

Hi everyone. We have CrowdSec deployed in production (with OpenResty bouncer if this is relevant) and even though it works properly, "Http error 400 while talking to LAPI" are regularly being thrown in the logs. These seem to happen only for certain types of requests (origin and paths)

I couldn't find any relevant information on why error 400 happens. How can we look deeper into what causes these errors, like seeing the exact contents of LAPI request that caused the error?

Thank you in advance!

CrowdSec•6/5/25, 8:07 AM

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6/5/25, 8:07 AM

blotus•6/5/25, 1:05 PM

You mean in the bouncer logs ?
Do you see anything in the crowdsec logs at the same time ?

Bblotus You mean in the bouncer logs ? Do you see anything in the crowdsec logs at the s...

pokeghostOP•6/7/25, 7:36 AM

These originate from the bouncer's function. In I can see a lot of but I wasn't able to find any details on it. Do you have suggestions where should I look?

Ppokeghost These originate from the bouncer's `Allow()` function. In `/var/log/crowdsec.log...

Loz•6/9/25, 6:40 AM

Are you on the latest version of CrowdSec eg: version ?

LLoz Are you on the latest version of CrowdSec eg: version `1.6.8`?

pokeghostOP•6/11/25, 7:28 AM

yes, here's the version details: