If you're hosting your own world and others can't join, consider these steps:
Mods are a common cause of "Online Fix" needs due to version mismatches or data processing lag.
Fully restart both your computer and your router to clear any temporary network glitches.
Before trying advanced technical solutions, start with these essential troubleshooting steps:
Using a public DNS like Google DNS can improve connectivity. Set your Preferred DNS to 8.8.8.8 and Alternate DNS to 8.8.4.4 .
Incorrect system time can lead to authentication errors. Right-click your taskbar clock, select Adjust date and time , and ensure Set time automatically is toggled on. 2. Networking and Firewall Settings