So for the longest time, years, me and my sister have played Minecraft together via open to Lan. Out of the blue today, when I tried to open my world, it won't show up on her computer. She can open a world on HER computer and I can connect to it, but when I open my world it won't show up on hers. We are on the same network as we have always been, we are both running the most current version, and we both have updated out Java. I went as far as completely turning off Firewall on my computer and it still didn't work. I already tried adjusting the Firewall settings on both of our computers and still nothing. Direct connect did not work either. Any help would be greatly appreciated. Last time we played was a few months ago and it worked perfectly fine. Nothing has changed with our network or either of our computers so I'm not sure why it all of a sudden stopped.
So for the longest time, years, me and my sister have played Minecraft together via open to Lan. Out of the blue today, when I tried to open my world, it won't show up on her computer. She can open a world on HER computer and I can connect to it, but when I open my world it won't show up on hers. We are on the same network as we have always been, we are both running the most current version, and we both have updated out Java. I went as far as completely turning off Firewall on my computer and it still didn't work. I already tried adjusting the Firewall settings on both of our computers and still nothing. Direct connect did not work either. Any help would be greatly appreciated. Last time we played was a few months ago and it worked perfectly fine. Nothing has changed with our network or either of our computers so I'm not sure why it all of a sudden stopped.
Check for incompatible software or other antivirus/ parental control software, see point 2 here https://www.minecraftforum.net/forums/support/java-edition-support/2827415-1-12-faqs-read-before-posting
Nothing on that list is creating a problem. Not sure why only I can't open Lan worlds but my sister can and we're on the same network.