Since 2025, web browsers such as Chrome, Edge, and Firefox have implemented a new security rule called Local Network Access (LNA).
This measure is designed to better protect users from malicious websites, but it may also block legitimate connections used by OCH Planner / OilChangeStickers.info to print your labels.

When using the system for the first time, your browser may display a message like this:

“oilchangestickers.info wants to scan for devices on your local network and connect to them.”

🟢 Click “Allow” to enable the system to send your maintenance labels to your printer.
🔴 If you click “Block,” printing will not work until you reset the permissions in your browser’s site settings.

To learn more about this new rule:
👉 Official specification – Local Network Access (WICG)
👉 Official announcement from Chrome Developers

If you accidentally clicked “Block,” please re-enable the access permission in your browser settings.