License validation error while installation

[aimonext]

I am facing a problem while installing openjdk via snapd.

• command : $sudo snap install openjdk

• feedback:
  error: cannot perform the following tasks:
  Mount snap "openjdk" (1241) (cannot validate license "GPL-2.0-with-classpath-exception": unknown license: GPL-2.0-with-classpath-exception)

[jgneff]

That problem was fixed by canonical/snapd#9629 in snapd version 2.49, released on 2021-02-09. The following commands, shown below on my system, will print your snap version string:

$ snap list snapd
Name   Version  Rev    Tracking       Publisher   Notes
snapd  2.58     17950  latest/stable  canonical✓  snapd

$ snap --version
snap    2.58
snapd   2.58
series  16
ubuntu  20.04
kernel  5.15.0-58-generic

If you're running an older version, install the latest by following the instructions for your Linux distribution at the bottom of the OpenJDK Snap page under Install OpenJDK on your Linux distribution.