Yunohost 401 when trying to access webhooks

Hello!

Important: I am not using LDAP for Jenkins, but instead "Jenkins' own user database" as I want to manage myself the users.

I'm trying to trigger a build from Gitlab using Jenkins webhooks. I have created a token for my admin user and I gave to Gitlab a URL like this : https://user:token@myserver/jenkins/job/jobname/build Then I got a banner saying:

Hook executed successfully but returned HTTP 401 <html> <head><title>401 Authorization Required</title><script type="text/javascript" src="/ynh_portal.js"></script><link type="text/css" rel="stylesheet" href="/ynh_overlay.css"><script type="text/javascript" src="/ynhtheme/custom_portal.js"></script><link type="text/css" rel="stylesheet" href="/ynhtheme/custom_overlay.css"></head> <body> <center><h1>401 Authorization Required</h1></center> <hr><center>nginx</center> </body> </html>

So I tried with cURL: curl -X POST https://myserver/jenkins/job/jobname/build --user username:token and I obtain the same 401 error.

But if I gave my yunohost credential instead --user ynh_user:ynh_pass I obtain this, which seems to be the real 401 from Jenkins:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1"/>
<title>Error 401 Unauthorized</title>
<script type="text/javascript" src="/ynh_portal.js"></script><link type="text/css" rel="stylesheet" href="/ynh_overlay.css"><script type="text/javascript" src="/ynhtheme/custom_portal.js"></script><link type="text/css" rel="stylesheet" href="/ynhtheme/custom_overlay.css"></head>
<body><h2>HTTP ERROR 401 Unauthorized</h2>
<table>
<tr><th>URI:</th><td>/jenkins/job/UNM_Compilation/</td></tr>
<tr><th>STATUS:</th><td>401</td></tr>
<tr><th>MESSAGE:</th><td>Unauthorized</td></tr>
<tr><th>SERVLET:</th><td>Stapler</td></tr>
</table>
<hr/><a href="https://eclipse.org/jetty">Powered by Jetty:// 10.0.18</a><hr/>

</body>
</html>

My guess is that Yunohost is preventing my webhooks calls to get to jenkins, although "visitors" are authorized to access the app. I think it's a nginx configuration to change ? Maybe it's not a bug and using Jenkins without LDAP is not supported by YuNoHost?

Context

Hardware: Old laptop computer (Intel i3)
YunoHost version: 11.2.30
I have access to my server: Through SSH | through the webadmin
Are you in a special context or did you perform some particular tweaking on your YunoHost instance?: no (appart from not using LDAP for Jenkins)
Using, or trying to install package version/branch: 2.426.3~ynh2

Steps to reproduce

Create a freestyle job
To to Manage Users > Users in Jenkins
Select a user with the ability to build and generate an API token
Try to use the webhook with curl : curl -X POST https://myserver/jenkins/job/jobname/build --user username:token
Obtain a 401 from Yunohost Nginx

Expected behavior

The webhook trigger the build.

Logs

The request doesn't create access log inside jenkins, inferring that the request is not reaching it.

YunoHost-Apps / jenkins_ynh