I made a report about the extension issue.
If you're not getting past the first screen, there's probably something wrong somewhere, yes. Try the steps I've given on the last page, or look out for one of those potential issues:
- The Cache and Wii User folders are not the same. (copying over someone's files might not replace all the files)
- The Wiimote extensions are not all set to the same thing. That should really be done by the emulator itself though.
- I don't think other settings being different should cause a freeze or an error at netplay startup, but go over them once more anyway.
- Make sure to completely close the emulator before starting each netplay attempt. Not doing so on either side will result in failure, all the time as far as I've seen.
I've not actually seen a "desync error" popup in a long time and I've forgotten what causes it. From my testing, all things above cause either a freeze or a desync without popup in the latest build.
EDIT: I remembered one cause of the desync popup that still does it; assigning 2 wiimotes to each person. (wiimote 0: player1, wiimote 1:player1, wiimote 2:player2, wiimote 3:player2) Might not be the exact cause, but this scenario does cause the error. Also note that the game will freeze if wiimote 0 is not used while another wiimote is used.
If you're not getting past the first screen, there's probably something wrong somewhere, yes. Try the steps I've given on the last page, or look out for one of those potential issues:
- The Cache and Wii User folders are not the same. (copying over someone's files might not replace all the files)
- The Wiimote extensions are not all set to the same thing. That should really be done by the emulator itself though.
- I don't think other settings being different should cause a freeze or an error at netplay startup, but go over them once more anyway.
- Make sure to completely close the emulator before starting each netplay attempt. Not doing so on either side will result in failure, all the time as far as I've seen.
I've not actually seen a "desync error" popup in a long time and I've forgotten what causes it. From my testing, all things above cause either a freeze or a desync without popup in the latest build.
EDIT: I remembered one cause of the desync popup that still does it; assigning 2 wiimotes to each person. (wiimote 0: player1, wiimote 1:player1, wiimote 2:player2, wiimote 3:player2) Might not be the exact cause, but this scenario does cause the error. Also note that the game will freeze if wiimote 0 is not used while another wiimote is used.