I want to connect with my brother with LAN multiplayer, but it isn't working.

An attachment with a disallowed file extension has been removed from this ticket.

Executable files and documents are not allowed as attachments.
Please attach crash reports, log files and screenshots as they are instead of pasting them into a document.
_{-- I am a bot. This action was performed automatically! If you think it was incorrect, please notify us on Discord or Reddit}

Please provide more details regarding this issue such as error messages. Reports similar to these often get marked as "Incomplete" due to lack of information.

This is not a forum, if you can't figure it out, this is not the place to post such things. Close the ticket.

Thank you for your report!
However, this issue is Incomplete.

Your report does not contain enough information. As such, we're unable to understand or reproduce the problem.

You are welcome to create a new ticket about your issue with more detailed information. In case of a game crash, be sure to attach the crash report from [minecraft/crash-reports/crash-<DATE>-client.txt|https://minecrafthopper.net/help/finding-minecraft-data-folder/].
However, please review the Bug Tracker Guidelines before creating new reports. Be sure to search for an existing issue as it is likely to have already been reported.

Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki