# 504 Gateway Time-out
The extension requires a connection to the Algolia servers to index the records of the site. In particular, the current API opens connections to:
If the connection to external servers is restricted, then an error such as "Gateway Time-out" or connection error is received. To solve, the issue, please, ensure that your server can open a connection to the domains listed above.
# Logging Mode: Developer's swiss army knife
The Logging Mode is a key tool to check the extension inner workings. It is a handy way to check component internals, beyond a simple error message.
You can enable the logging mode to leave a track of server-side operations.
To enable the Logging mode:
- Access the Options menu, in Components/(Extension Name) Control Panel.
- In the System settings tab,
- Enable the: File Logging Level (For example, 3-All)
As a result, the extension is going to generate the xt-logging.log file with all operations details into logs/ directory. Please, check the file generated in