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[GH-ISSUE #3261] Testing http challenge Uncaught SyntaxError: Unexpected end of JSON input #2202

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opened 2026-02-26 07:34:29 +03:00 by kerem · 4 comments

kerem commented

2026-02-26 07:34:29 +03:00

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Originally created by @jeberhardt87 on GitHub (Oct 16, 2023).
Original GitHub issue: https://github.com/NginxProxyManager/nginx-proxy-manager/issues/3261

Checklist

Have you pulled and found the error with jc21/nginx-proxy-manager:latest docker image?
- Yes
Are you sure you're not using someone else's docker image?
- Yes
Have you searched for similar issues (both open and closed)?
- Yes

Describe the bug
When clicking on "Test Server reachability" in the SSL Certificates menu I get the following error:
"Communication with the API failed, is NPM running correctly?"
In the log I see the following:

10/16/2023] [11:50:13 AM] [SSL      ] › ℹ  info      Testing http challenge for cloud.mikropositronik.de
nginx-proxy-app-1  | Uncaught SyntaxError: Unexpected end of JSON input
nginx-proxy-app-1  | 
nginx-proxy-app-1  | FROM
nginx-proxy-app-1  | bash: line 1:   235 Trace/breakpoint trap   (core dumped) node --abort_on_uncaught_exception --max_old_space_size=250 index.js
nginx-proxy-app-1  | ❯ Starting backend ...
nginx-proxy-app-1  | [10/16/2023] [11:50:16 AM] [Global   ] › ℹ  info      Using MySQL configuration
nginx-proxy-app-1  | [10/16/2023] [11:50:17 AM] [Global   ] › ✖  error     connect ECONNREFUSED 172.19.0.2:3306
nginx-proxy-app-1  | [10/16/2023] [11:50:18 AM] [Migrate  ] › ℹ  info      Current database version: 20211108145214
nginx-proxy-app-1  | [10/16/2023] [11:50:18 AM] [Setup    ] › ℹ  info      Logrotate Timer initialized
nginx-proxy-app-1  | [10/16/2023] [11:50:18 AM] [Setup    ] › ℹ  info      Logrotate completed.
nginx-proxy-app-1  | [10/16/2023] [11:50:18 AM] [IP Ranges] › ℹ  info      Fetching IP Ranges from online services...
nginx-proxy-app-1  | [10/16/2023] [11:50:18 AM] [IP Ranges] › ℹ  info      Fetching https://ip-ranges.amazonaws.com/ip-ranges.json
nginx-proxy-app-1  | [10/16/2023] [11:50:19 AM] [IP Ranges] › ℹ  info      Fetching https://www.cloudflare.com/ips-v4
nginx-proxy-app-1  | [10/16/2023] [11:50:19 AM] [IP Ranges] › ℹ  info      Fetching https://www.cloudflare.com/ips-v6
nginx-proxy-app-1  | [10/16/2023] [11:50:19 AM] [SSL      ] › ℹ  info      Let's Encrypt Renewal Timer initialized
nginx-proxy-app-1  | [10/16/2023] [11:50:19 AM] [SSL      ] › ℹ  info      Renewing SSL certs close to expiry...
nginx-proxy-app-1  | [10/16/2023] [11:50:19 AM] [IP Ranges] › ℹ  info      IP Ranges Renewal Timer initialized
nginx-proxy-app-1  | [10/16/2023] [11:50:19 AM] [Global   ] › ℹ  info      Backend PID 290 listening on port 3000 ...
nginx-proxy-app-1  | [10/16/2023] [11:50:20 AM] [Nginx    ] › ℹ  info      Reloading Nginx
nginx-proxy-app-1  | [10/16/2023] [11:50:20 AM] [SSL      ] › ℹ  info      Renew Complete
nginx-proxy-app-1  | [10/16/2023] [11:50:21 AM] [SSL      ] › ✖  error     connect ECONNREFUSED 172.19.0.2:3306
nginx-proxy-app-1  | [10/16/2023] [11:50:21 AM] [SSL      ] › ✖  error     connect ECONNREFUSED 172.19.0.2:3306

Nginx Proxy Manager Version
v2.10.4

To Reproduce
Steps to reproduce the behavior:

Go to 'SSL Certificates'
Click on 'Test Server Reachability'
See error

Expected behavior
Server should be reachable

Operating System
docker compose on Ubuntu 23

Originally created by @jeberhardt87 on GitHub (Oct 16, 2023). Original GitHub issue: https://github.com/NginxProxyManager/nginx-proxy-manager/issues/3261  **Checklist** - Have you pulled and found the error with `jc21/nginx-proxy-manager:latest` docker image? - Yes - Are you sure you're not using someone else's docker image? - Yes - Have you searched for similar issues (both open and closed)? - Yes **Describe the bug** When clicking on "Test Server reachability" in the SSL Certificates menu I get the following error: "Communication with the API failed, is NPM running correctly?" In the log I see the following: ``` 10/16/2023] [11:50:13 AM] [SSL ] › ℹ info Testing http challenge for cloud.mikropositronik.de nginx-proxy-app-1 | Uncaught SyntaxError: Unexpected end of JSON input nginx-proxy-app-1 | nginx-proxy-app-1 | FROM nginx-proxy-app-1 | bash: line 1: 235 Trace/breakpoint trap (core dumped) node --abort_on_uncaught_exception --max_old_space_size=250 index.js nginx-proxy-app-1 | ❯ Starting backend ... nginx-proxy-app-1 | [10/16/2023] [11:50:16 AM] [Global ] › ℹ info Using MySQL configuration nginx-proxy-app-1 | [10/16/2023] [11:50:17 AM] [Global ] › ✖ error connect ECONNREFUSED 172.19.0.2:3306 nginx-proxy-app-1 | [10/16/2023] [11:50:18 AM] [Migrate ] › ℹ info Current database version: 20211108145214 nginx-proxy-app-1 | [10/16/2023] [11:50:18 AM] [Setup ] › ℹ info Logrotate Timer initialized nginx-proxy-app-1 | [10/16/2023] [11:50:18 AM] [Setup ] › ℹ info Logrotate completed. nginx-proxy-app-1 | [10/16/2023] [11:50:18 AM] [IP Ranges] › ℹ info Fetching IP Ranges from online services... nginx-proxy-app-1 | [10/16/2023] [11:50:18 AM] [IP Ranges] › ℹ info Fetching https://ip-ranges.amazonaws.com/ip-ranges.json nginx-proxy-app-1 | [10/16/2023] [11:50:19 AM] [IP Ranges] › ℹ info Fetching https://www.cloudflare.com/ips-v4 nginx-proxy-app-1 | [10/16/2023] [11:50:19 AM] [IP Ranges] › ℹ info Fetching https://www.cloudflare.com/ips-v6 nginx-proxy-app-1 | [10/16/2023] [11:50:19 AM] [SSL ] › ℹ info Let's Encrypt Renewal Timer initialized nginx-proxy-app-1 | [10/16/2023] [11:50:19 AM] [SSL ] › ℹ info Renewing SSL certs close to expiry... nginx-proxy-app-1 | [10/16/2023] [11:50:19 AM] [IP Ranges] › ℹ info IP Ranges Renewal Timer initialized nginx-proxy-app-1 | [10/16/2023] [11:50:19 AM] [Global ] › ℹ info Backend PID 290 listening on port 3000 ... nginx-proxy-app-1 | [10/16/2023] [11:50:20 AM] [Nginx ] › ℹ info Reloading Nginx nginx-proxy-app-1 | [10/16/2023] [11:50:20 AM] [SSL ] › ℹ info Renew Complete nginx-proxy-app-1 | [10/16/2023] [11:50:21 AM] [SSL ] › ✖ error connect ECONNREFUSED 172.19.0.2:3306 nginx-proxy-app-1 | [10/16/2023] [11:50:21 AM] [SSL ] › ✖ error connect ECONNREFUSED 172.19.0.2:3306 ``` **Nginx Proxy Manager Version** v2.10.4 **To Reproduce** Steps to reproduce the behavior: 1. Go to 'SSL Certificates' 2. Click on 'Test Server Reachability' 4. See error **Expected behavior** Server should be reachable **Operating System** docker compose on Ubuntu 23

kerem

2026-02-26 07:34:29 +03:00

closed this issue
added the
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kerem commented

2026-02-26 07:34:29 +03:00

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@tomasagray commented on GitHub (Oct 23, 2023):

Bump. Same issue here. Also running within a docker container, with similar log output, minus the SQL errors.

@tomasagray commented on GitHub (Oct 23, 2023): Bump. Same issue here. Also running within a docker container, with similar log output, minus the SQL errors.

kerem commented

2026-02-26 07:34:29 +03:00

Author

Owner

@marmik18 commented on GitHub (Jan 12, 2024):

+1, same issue faced by me.

@marmik18 commented on GitHub (Jan 12, 2024): +1, same issue faced by me.

kerem commented

2026-02-26 07:34:29 +03:00

Author

Owner

@github-actions[bot] commented on GitHub (Jul 19, 2024):

Issue is now considered stale. If you want to keep it open, please comment 👍

@github-actions[bot] commented on GitHub (Jul 19, 2024): Issue is now considered stale. If you want to keep it open, please comment :+1:

kerem commented

2026-02-26 07:34:29 +03:00

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Owner

@github-actions[bot] commented on GitHub (Aug 9, 2025):

Issue was closed due to inactivity.

@github-actions[bot] commented on GitHub (Aug 9, 2025): Issue was closed due to inactivity.

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