Isn't able to install something from snap-store

Hello all!

I installed snapd on the Astra Linux from debian stretch repositories.
After that I installed core and snap-store.
And I can install some snap packages from terminal.
But I’m not able to install something from snap-store.
Nothing happened when I press the install button.
snapd logs In the journalctl:
июн 17 22:11:17 astra-vm snapd[1970]: AppArmor status: apparmor not enabled
июн 17 22:11:18 astra-vm snapd[1970]: daemon.go:248: started snapd/2.51 (series 16; classic; devmode) debian/9 (amd64) linux/4.15.3-3-generic.
июн 17 22:11:18 astra-vm snapd[1970]: daemon.go:341: adjusting startup timeout by 55s (pessimistic estimate of 30s plus 5s per snap)
июн 17 22:16:08 astra-vm snapd[1970]: access.go:66: polkit error: Action io.snapcraft.snapd.manage is not registered
июн 17 22:16:12 astra-vm snapd[1970]: access.go:66: polkit error: Action io.snapcraft.snapd.manage is not registered
июн 17 23:05:16 astra-vm snapd[1970]: access.go:66: polkit error: Action io.snapcraft.snapd.manage is not registered

snap --version:
snap 2.51
snapd 2.51
series 16
debian 9
kernel 4.15.3-3-generic

Could some one help me in this case?