Graylog 4.1.5 - Blank page when try to access web interface

Hello
Faced this error. Shows nothing when opening a webpage, just a white background.

Description of problem

After updating Graylog from version 4.0.5 to 4.1.5 and connecting the plugin for sending notifications to the telegram group and creating a notification in Graylog, I lost access to the web interface.
Before connecting the telegram plugin and creating notifications in Graylog, everything worked fine.
The Graylog update was performed according to the instructions: Operating System Packages — Graylog 4.1.0 documentation
The plugin was installed according to the instructions: GitHub - irgendwr/TelegramAlert: 🔔 Telegram Notification Plugin for Graylog

Description of steps I’ve taken to attempt to solve the issue

  1. Checked port 9000 is open - telnet 10.1.1.133 9000.
  2. Enableb CORS headers for HTTP interface
    http_enable_cors = true
  3. Checked the console when accessing the webpage
    Sceenshots was attached.

Operating system information

  • CentOS 7 (2009) with last updates.

Package versions

  1. Elasticsearch-oss-0:7.10.2-1.x86_64

  2. Graylog-4.1-repository-0:1-3.noarch
    Graylog-enterprise-integrations-plugins-0:4.1.5-1.noarch
    Graylog-enterprise-plugins-0:4.1.5-1.noarch
    Graylog-integrations-plugins-0:4.1.5-1.noarch
    Graylog-server-0:4.1.5-1.noarch

  3. Mongodb-org-0:4.2.16-1.el7.x86_64
    Mongodb-org-mongos-0:4.2.16-1.el7.x86_64
    Mongodb-org-server-0:4.2.16-1.el7.x86_64
    Mongodb-org-shell-0:4.2.16-1.el7.x86_64
    Mongodb-org-tools-0:4.2.16-1.el7.x86_64

Thank You for attention.
Regards, Nursultan.

server.conf

Are you seeing anything in Graylog logs?

tail -f /var/log/graylog-server/server.log

[user3@srv-graylog4 ~]# tail -f /var/log/graylog-server/server.log
2021-09-15T22:13:38.195+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:39.212+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:40.197+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:41.197+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:43.233+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:44.065+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:45.070+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:46.066+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:47.074+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:48.061+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:49.070+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:50.062+05:00 ERROR [AuditLogger] Unable to write audit log entr y because there is no valid license.
2021-09-15T22:13:51.072+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:13:52.073+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:13:53.078+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:13:54.070+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:13:55.071+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:13:56.090+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:13:57.076+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:13:58.154+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:13:59.085+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:13:59.986+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:14:00.473+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:14:01.207+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:14:01.941+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:14:02.173+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:05.850+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:08.410+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:08.562+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:11.752+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:11.895+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:12.860+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:13.001+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:13.925+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:14.062+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:15.004+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:15.148+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:37.093+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:37.234+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:40.494+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:41.298+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:41.939+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:42.165+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
^C
[user3@srv-graylog4 ~]# tail -f /var/log/graylog-server/server.log
2021-09-15T22:15:13.925+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:14.062+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:15.004+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:15.148+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:37.093+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:37.234+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:40.494+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:41.298+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:41.939+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.
2021-09-15T22:15:42.165+05:00 ERROR [AuditLogger] Unable to write audit log entry because there is no valid license.

Did you try a different browser? I notice the one you posted notes its connecting(?) via VPN?

Maybe back out the plugin /usr/share/graylog-server/plugin/ and restart graylog?

  • Did you try a different browser? I notice the one you posted notes its connecting(?) via VPN?
  • Yes, I tried a different browsers (Opera, Mozilla Firefox, Google Chrome, Vivaldi). I posted notes via VPN. Also i tried to open http://10.1.1.133:9000 being from the same subnet, for example from 10.1.1.240. Same problem, blank page again.
  • Maybe back out the plugin /usr/share/graylog-server/plugin/ and restart graylog?
  • I deleted graylog-plugin-telegram-notification-2.3.6.jar and restarted Graylog. Graylog works fine.

I wanted to implement sending notifications from Graylog for certain events. Additionally, I wrote to the author of the plugin about the problem.

The plugin author suggested that the error was related to the enterprise plugin. After removing the plugin, the web interface began to open.

yum remove graylog-enterprise-plugins

Thank You for help and attention.