Tactical RMM Agent Fails Install at Mesh Agent Download

[finn1476]

Server Info (please complete the following information):

• OS: Debian 13
• Browser: Firefox
• RMM Version v1.5.2:

Installation Method:

• [x ] Standard
• Standard with --insecure flag at install
• Docker

Agent Info (please complete the following information):

• Agent version (2.11.0I):
• Agent OS: [Windows 11]

Describe the bug
The RMM Installer cant download the Mesh Installer and Fails if i try to manually download the Mesh Installer from the Mesh Central it also Fails the Installer also does not lay in the File System under :
root@Tactical-RMM:/meshcentral/meshcentral-data/signedagents# ls
MeshCmdARM64.exe MeshServiceARM64.exe
root@Tactical-RMM:/meshcentral/meshcentral-data/signedagents#

If i cp the ARM exe to MeshService64.exe then it would download it but the install woud fail since it cant install the Mesh Agent

---

STATUS       : 400 Bad Request
PROTO        : HTTP/1.1
RECEIVED AT  : 2026-08-27T12:51:57.707061+02:00
TIME DURATION: 118.9871ms
HEADERS      :
        Allow: POST, OPTIONS
        Content-Length: 200
        Content-Type: application/json
        Date: Thu, 27 Aug 2026 10:51:57 GMT
        Server: openresty
        Vary: origin
BODY         :
***** RESPONSE WRITTEN INTO FILE *****
==============================================================================
Unable to download the mesh agent from the RMM.
time="2026-08-27T12:51:57+02:00" level=fatal msg="Unable to download the mesh agent from the RMM. "
exit status 1

C:\Users\Finn.Rueckemann>

**To Reproduce**
Steps to reproduce the behavior:
Not Sure

**Expected behavior**
Download the Mesh Agent and then Complete the Install of the Tactical RMM Agent

**Screenshots**
If applicable, add screenshots to help explain your problem.

<img width="1904" height="252" alt="Image" src="https://github.com/user-attachments/assets/a7546d69-d5d6-48dc-9b18-06130bb2cd8a" />

**Additional context**
We do use a NGINX Reverse Proxy in front of our Install.

[silversword411]

Did you change settings in either trmm general > meshcentral, or rename the default mesh group from the default name?

[modem-19]

I just discovered I'm having the same exact issue on my TRMM setup and I can confirm nothing has been changed in General > MeshCentral before or after updating to the most recent TRMM and agent versions.

[finn1476]

Hey with my Install it was that our AV on the Server was Deleting the Files if you Restart Mesh Central the Files should Reapere if they do not maybe look in your AV Console if that is Deleting the Files