AMP 2.6.2.0 – Passthru Auth Disabled and Plugin UI Broken After Update (Standalone Setup)

[senne1009]

OS Name/Version:
Ubuntu Server 24.04

Product Name/Version:
AMP Instance Manager v2.6.2.0 (Mainline / Release)

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Problem Description:
After updating to AMP 2.6.2.0, my previously working standalone controller setup stopped working properly.

It started with this error when trying to access instances:

Failed to login to remote instance – Auth Disabled  
Authentication passthru is disabled on the controller – The auth server at http://localhost:8080/ is configured not to allow other instances to authenticate through it.

After that, even once I attempted to fix the passthrough settings, the UI started breaking too:

• No diagnostics load for any instance (CPU/RAM/ports)
• Metrics panels are empty
• Web UI shows Data Binding Failure for DiagnosticsVM (only on local ip)
• Browser DevTools shows 404s for:

  /Plugins/MinecraftModule.st...
  /Plugins/AnalyticsPlugin.st...
  /Plugins/LocalFileBackupPlugin.st...
  

This affects all instances, even if they are started and running correctly in the background.

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Steps to reproduce:

• Step 1: Upgrade AMP to v2.6.2.0
• Step 2: Access AMP via domain
• Step 3: Attempt to open a sub-instance (e.g., Minecraft server)
• Step 4: See “Auth Disabled” popup, then no metrics/UI loads

I’ve also tried with the public IP and local IP (e.g., http://192.168.50.17:8080) — same result

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Actions taken to resolve so far:

• Edited ~/.ampdata/instances/ADS01/AMPConfig.conf and added:

  Security.EnablePassthruAuth=True  
  Security.PassthruAuthLocalOnly=False  
  Webserver.UsingReverseProxy=True
  

• Restarted the controller with ampinstmgr restart ADS01
• Cleared browser cache, tried in incognito/private window

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Thanks in advance,
Senne

[Greelan]

Try:

ampinstmgr repairauth standalone

[senne1009]

What do I enter for the url of the controller/standalone instance? I tried my local ip but it says bad URL. I also tried domain and 127.0.0.1 but same bad url message.

[Greelan]

http://localhost:8080

Assuming 8080 is your ADS port

[senne1009]

All my instances are still missing UI the only thing that is working fine is the ADS01 instance.

in the console it also gives failed to load resource:

In deployment log I keep getting this.

Exception in API call Core/GetUpdates
UnauthorizedAccessException
[0] (UnauthorizedAccessException) : You do not have permission to use this method (GSMyAdmin.WebServer.GetUpdates) at this time. This method requires the Session.Exists permission.
   at GSMyAdmin.WebServer.WebAttributes.InvokeMethod(String MethodName, JObject Data, HttpContext context, IWebSession Session, WebMethodsBase MethodsClass, IPAddress RealIP)
   at GSMyAdmin.WebServer.ApiService.InvokeAPI(HttpContext context, IWebSession session, JObject data, String requestModule, String requestMethod)

[Greelan]

Have you updated everything by following the guide? Or at least by running as root: getamp update

[senne1009]

Yes, I followed the update guide and all my instances are on 2.6.2 I checked with ampinstmgr showInstancesList. I have tried everything I know but nothing seems to work. I have cleared cache tried local ip, domain and public ip I can access the ADS01 on all of them look at the deployment log but once I press on an instance I get the errors in the console.

[Greelan]

Do you use cloudflare to proxy the panel?

[senne1009]

I don’t use cloudflare but I don’t remember how I did my domain I think I did it on setting up the panel when it asked for a domain.