@AppLee @domubpkm @TotalSonic Looks like I got an answer from their support, their servers are in maintenance, but should be done for tuesday, and still this error in ubports installer.

@Keneda good idea, it's worked for me too.

For windows version of ubports path is like that :

C:\Users\User\AppData\Roaming\ubports\yggdrasil

Thanks for your answers