The Unable to connect to world error on Minecraft PE prevents you from loading into your favourite world. There can be a variety of factors causing the Unable to connect error, but the fixes we list here should work either way. Make sure to follow closely for the best results!
Start the game on your device and go into the Settings from the home screen. Scroll down and select the Profile option. This will open up the User Profile and Settings tab. Here, click on Manage Account. This will open up the Xbox Store. Now, click on your avatar in the top left and select “More”. In the drop-down menu that appears, select “Sign Out”. Now, start up Minecraft once again and navigate to the Profile tab. Now, the prompt “Sign in for free” should appear on this page. Click on it, and make sure to select “Save to Microsoft Account”. Now, log into your account with your details, and try to load into your world. The error should now be fixed!
For Android users, go into your google play store and ensure you have the latest versions of Google Chrome and Android System WebView. This should resolve most if not all of your errors. Since this is a certified fix from Google, it is highly recommended that you try this method first and foremost.
Regardless of whether you are running the game on iOS or an Android-based OS, always make sure that you have the latest updates of your OS installed. There is a good chance that a faulty old version of your system software is causing the game to misbehave. Next, visit your app store and check for any updates to Minecraft. It is possible that the error that is causing your game to not function properly has already been fixed in the new patch.