Last updated 4 months ago

A collection of common issues / errors and their possible solutions.

View status / logs

Wiki.js runs using background processes, which means you may not see an error right away. The best way to look for errors / potential issues is by running these useful commands:

# View status of Wiki.js:
pm2 status wiki
# View active logs of Wiki.js:
pm2 logs wiki --lines 100

Output and error logs are also available in the /logs folder located in your Wiki.js installation folder.

Wiki.js won't start

Error: Listening on port XX requires elevated privileges!

Cause: Some Linux installations prevent Node.js from binding to ports in the lower range (e.g. < 1024). This occurs if you set a port such as 80 in config.yml.

Solution A: Allow the node process to safely access the port requested:

# Ubuntu / Debian
sudo apt-get install libcap2-bin
sudo setcap cap_net_bind_service=+ep `readlink -f \`which node\``

Solution B: Create a port redirection rule: (In the example below, you must set the port to 3000 in config.yml)

sudo iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3000

Solution C: Use a web server in front of Wiki.js. For example, use nginx to listen to port 80 / 443 and proxy all requests to Wiki.js running on a higher port (e.g. 3000).

Error: Port XX is already in use!

Cause: Another program is already listening to this port or an orphaned Wiki.js process was not closed properly.

Solutions: Make sure there are no orphaned Wiki.js process still running (look for node instances on Linux and node.exe processes on Windows). Look for applications that could be using this port (web servers, http applications, etc.)

Weird display, no styling, missing CSS

Cause: The value you entered for the host config parameter is wrong.

Solution: This value should correspond to the host/domain users are using to access your wiki, including the port if different than 80 / 443.

For example, if you access your wiki at, you must set your host to This has no relation to the server port. It must match exactly the URL and port used by the client to access the wiki.