Cannot find device backing the base snap core

nap 2.30-0.el7.centos.1
snapd 2.30-0.el7.centos.1
series 16
ol 7.4
kernel 3.10.0-693.21.1.el7.x86_64

After installing spotify and core I get this message:

Cannot find device backing the base snap core

Must have something todo with mountpoints no?

/dev/loop0 88704 88704 0 100% /snap/core/4486
/dev/loop2 128 128 0 100% /snap/hello-world/27
/dev/loop3 128 128 0 100% /snap/hello/20
/dev/loop1 166016 166016 0 100% /snap/spotify/13
/dev/loop4 131584 131584 0 100% /snap/deepin-music/1

all good now…

purged all snaps
restarted
reinstalled
works now…