Webdm not working with 64bits Kernel and 32bits User Space: "$plat_abi=aarch64-linux-gnu" & "/snap/webdm/current/bin arm-linux-gnueabihf"

This is possibly due to the wrong version of the snap being uploaded to the store for the architecture or a problem with how `snap install` determines the architecture.

Could you try building from source and seeing if the resulting arm64 snap works? The project is now located here:

https://github.com/snapcore/snapweb

I've also a branch which uses `snapcraft` to construct the snap which may be more useful:

https://github.com/snapcore/snapweb/tree/snapcraft

What version of snappy/snapd is used for this?

Could you please paste the output of:
$ snap list

I think the wrapper script is actually wrong here, it should not check the kernel (uname -i) but instead the go architecture. With the latest code where we do not use a "fat" binary we should probably just change the build script.
In the meantime `dpkg --print-architecture` (while we still have it) might be enough.
Thanks,
 Michael

Yes exactly, the issue is the wrapper script which checks the kernel arch instead of the user space one.
root@localhost:~# dpkg --print-architecture
armhf
root@localhost:~# uname -i
aarch64

In fact I think we should use SNAP_ARCH environment variable.

I've a work-in-progress PR open to use Snapcraft to build the snap. It removes all cross-building concerns from this project with the intention that the Launchpad build farm will build for all supported architectures and upload to the store on the edge channel automatically.

There have been changes to the build script lately, can you please retest with the latest version of snapweb?