here is the path then mods [ C:\Users\your user name\AppData\LocalLow\Jundroo\SimplePlanes\Mods ] should remove the old mod multiplayer and paste the new version and it's supposed to help. the fix patch 0.16: https://www.simpleplanes.com/Forums/View/1606240/Multiplayer-Mod-Patch-0-16
@PLdawid303 I tried and nothing worked, i.e. an update error that was released or not released
here is the path then mods [ C:\Users\your user name\AppData\LocalLow\Jundroo\SimplePlanes\Mods ] should remove the old mod multiplayer and paste the new version and it's supposed to help. the fix patch 0.16: https://www.simpleplanes.com/Forums/View/1606240/Multiplayer-Mod-Patch-0-16
+2@LetMehThink I also have a problem with attaching so the update is not released or there is an update error somewhere, but nothing is known